diff --git a/beacon-chain/rpc/prysm/v1alpha1/validator/sync_committee.go b/beacon-chain/rpc/prysm/v1alpha1/validator/sync_committee.go
index 66142f1ebb..b5034ae1f7 100644
--- a/beacon-chain/rpc/prysm/v1alpha1/validator/sync_committee.go
+++ b/beacon-chain/rpc/prysm/v1alpha1/validator/sync_committee.go
@@ -145,7 +145,7 @@ func (vs *Server) AggregatedSigAndAggregationBits(
 	blockRoot []byte,
 ) ([]byte, []byte, error) {
 	subCommitteeSize := params.BeaconConfig().SyncCommitteeSize / params.BeaconConfig().SyncCommitteeSubnetCount
-	sigs := make([]bls.Signature, 0, subCommitteeSize)
+	sigs := make([][]byte, 0, subCommitteeSize)
 	bits := ethpb.NewSyncCommitteeAggregationBits()
 	for _, msg := range msgs {
 		if bytes.Equal(blockRoot, msg.BlockRoot) {
@@ -159,11 +159,7 @@ func (vs *Server) AggregatedSigAndAggregationBits(
 				indexMod := i % subCommitteeSize
 				if subnetIndex == subnetId && !bits.BitAt(indexMod) {
 					bits.SetBitAt(indexMod, true)
-					sig, err := bls.SignatureFromBytes(msg.Signature)
-					if err != nil {
-						return []byte{}, nil, errors.Wrapf(err, "Could not get bls signature from bytes")
-					}
-					sigs = append(sigs, sig)
+					sigs = append(sigs, msg.Signature)
 				}
 			}
 		}
@@ -171,7 +167,11 @@ func (vs *Server) AggregatedSigAndAggregationBits(
 	aggregatedSig := make([]byte, 96)
 	aggregatedSig[0] = 0xC0
 	if len(sigs) != 0 {
-		aggregatedSig = bls.AggregateSignatures(sigs).Marshal()
+		uncompressedSigs, err := bls.MultipleSignaturesFromBytes(sigs)
+		if err != nil {
+			return nil, nil, errors.Wrapf(err, "could not decompress signatures")
+		}
+		aggregatedSig = bls.AggregateSignatures(uncompressedSigs).Marshal()
 	}
 
 	return aggregatedSig, bits, nil
diff --git a/crypto/bls/bls.go b/crypto/bls/bls.go
index 41d93407c3..b0832610d4 100644
--- a/crypto/bls/bls.go
+++ b/crypto/bls/bls.go
@@ -29,6 +29,11 @@ func SignatureFromBytes(sig []byte) (Signature, error) {
 	return blst.SignatureFromBytes(sig)
 }
 
+// MultipleSignaturesFromBytes creates a slice of BLS signatures from a LittleEndian 2d-byte slice.
+func MultipleSignaturesFromBytes(sigs [][]byte) ([]Signature, error) {
+	return blst.MultipleSignaturesFromBytes(sigs)
+}
+
 // AggregatePublicKeys aggregates the provided raw public keys into a single key.
 func AggregatePublicKeys(pubs [][]byte) (PublicKey, error) {
 	return blst.AggregatePublicKeys(pubs)
diff --git a/crypto/bls/blst/signature.go b/crypto/bls/blst/signature.go
index afba039d0a..942228e97f 100644
--- a/crypto/bls/blst/signature.go
+++ b/crypto/bls/blst/signature.go
@@ -46,6 +46,39 @@ func SignatureFromBytes(sig []byte) (common.Signature, error) {
 	return &Signature{s: signature}, nil
 }
 
+// MultipleSignaturesFromBytes creates a group of BLS signatures from a LittleEndian 2d-byte slice.
+func MultipleSignaturesFromBytes(multiSigs [][]byte) ([]common.Signature, error) {
+	if features.Get().SkipBLSVerify {
+		return []common.Signature{}, nil
+	}
+	if len(multiSigs) == 0 {
+		return nil, fmt.Errorf("0 signatures provided to the method")
+	}
+	for _, s := range multiSigs {
+		if len(s) != fieldparams.BLSSignatureLength {
+			return nil, fmt.Errorf("signature must be %d bytes", fieldparams.BLSSignatureLength)
+		}
+	}
+	multiSignatures := new(blstSignature).BatchUncompress(multiSigs)
+	if len(multiSignatures) == 0 {
+		return nil, errors.New("could not unmarshal bytes into signature")
+	}
+	if len(multiSignatures) != len(multiSigs) {
+		return nil, errors.Errorf("wanted %d decompressed signatures but got %d", len(multiSigs), len(multiSignatures))
+	}
+	wrappedSigs := make([]common.Signature, len(multiSignatures))
+	for i, signature := range multiSignatures {
+		// Group check signature. Do not check for infinity since an aggregated signature
+		// could be infinite.
+		if !signature.SigValidate(false) {
+			return nil, errors.New("signature not in group")
+		}
+		copiedSig := signature
+		wrappedSigs[i] = &Signature{s: copiedSig}
+	}
+	return wrappedSigs, nil
+}
+
 // Verify a bls signature given a public key, a message.
 //
 // In IETF draft BLS specification:
diff --git a/crypto/bls/blst/signature_test.go b/crypto/bls/blst/signature_test.go
index 2c1212391a..49757be70a 100644
--- a/crypto/bls/blst/signature_test.go
+++ b/crypto/bls/blst/signature_test.go
@@ -179,6 +179,64 @@ func TestSignatureFromBytes(t *testing.T) {
 	}
 }
 
+func TestMultipleSignatureFromBytes(t *testing.T) {
+	tests := []struct {
+		name  string
+		input [][]byte
+		err   error
+	}{
+		{
+			name: "Nil",
+			err:  errors.New("0 signatures provided to the method"),
+		},
+		{
+			name:  "Empty",
+			input: [][]byte{},
+			err:   errors.New("0 signatures provided to the method"),
+		},
+		{
+			name:  "Short",
+			input: [][]byte{{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}},
+			err:   errors.New("signature must be 96 bytes"),
+		},
+		{
+			name:  "Long",
+			input: [][]byte{{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}},
+			err:   errors.New("signature must be 96 bytes"),
+		},
+		{
+			name: "Bad",
+			input: [][]byte{{0x8f, 0xc0, 0xb4, 0x9e, 0x2e, 0xac, 0x50, 0x86, 0xe2, 0xe2, 0xaa, 0xf, 0xdc, 0x54, 0x23, 0x51, 0x6, 0xd8, 0x29, 0xf5, 0xae, 0x3, 0x5d, 0xb8, 0x31, 0x4d, 0x26, 0x3, 0x48, 0x18, 0xb9, 0x1f, 0x6b, 0xd7, 0x86, 0xb4, 0xa2, 0x69, 0xc7, 0xe7, 0xf5, 0xc0, 0x93, 0x19, 0x6e, 0xfd, 0x33, 0xb8, 0x1, 0xe1, 0x1f, 0x4e, 0xb4, 0xb1, 0xa0, 0x1, 0x30, 0x48, 0x8a, 0x6c, 0x97, 0x29, 0xd6, 0xcb, 0x1c, 0x45, 0xef, 0x87, 0xba, 0x4f, 0xce, 0x22, 0x84, 0x48, 0xad, 0x16, 0xf7, 0x5c, 0xb2, 0xa8, 0x34, 0xb9, 0xee, 0xb8, 0xbf, 0xe5, 0x58, 0x2c, 0x44, 0x7b, 0x1f, 0x9c, 0x22, 0x26, 0x3a, 0x22},
+				{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}},
+			err: errors.New("could not unmarshal bytes into signature"),
+		},
+		{
+			name: "Good",
+			input: [][]byte{
+				{0xab, 0xb0, 0x12, 0x4c, 0x75, 0x74, 0xf2, 0x81, 0xa2, 0x93, 0xf4, 0x18, 0x5c, 0xad, 0x3c, 0xb2, 0x26, 0x81, 0xd5, 0x20, 0x91, 0x7c, 0xe4, 0x66, 0x65, 0x24, 0x3e, 0xac, 0xb0, 0x51, 0x00, 0x0d, 0x8b, 0xac, 0xf7, 0x5e, 0x14, 0x51, 0x87, 0x0c, 0xa6, 0xb3, 0xb9, 0xe6, 0xc9, 0xd4, 0x1a, 0x7b, 0x02, 0xea, 0xd2, 0x68, 0x5a, 0x84, 0x18, 0x8a, 0x4f, 0xaf, 0xd3, 0x82, 0x5d, 0xaf, 0x6a, 0x98, 0x96, 0x25, 0xd7, 0x19, 0xcc, 0xd2, 0xd8, 0x3a, 0x40, 0x10, 0x1f, 0x4a, 0x45, 0x3f, 0xca, 0x62, 0x87, 0x8c, 0x89, 0x0e, 0xca, 0x62, 0x23, 0x63, 0xf9, 0xdd, 0xb8, 0xf3, 0x67, 0xa9, 0x1e, 0x84},
+				{0xb7, 0x86, 0xe5, 0x7, 0x43, 0xe2, 0x53, 0x6c, 0x15, 0x51, 0x9c, 0x6, 0x2a, 0xa7, 0xe5, 0x12, 0xf9, 0xb7, 0x77, 0x93, 0x3f, 0x55, 0xb3, 0xaf, 0x38, 0xf7, 0x39, 0xe4, 0x84, 0x6d, 0x88, 0x44, 0x52, 0x77, 0x65, 0x42, 0x95, 0xd9, 0x79, 0x93, 0x7e, 0xc8, 0x12, 0x60, 0xe3, 0x24, 0xea, 0x8, 0x10, 0x52, 0xcd, 0xd2, 0x7f, 0x5d, 0x25, 0x3a, 0xa8, 0x9b, 0xb7, 0x65, 0xa9, 0x31, 0xea, 0x7c, 0x85, 0x13, 0x53, 0xc0, 0xa3, 0x88, 0xd1, 0xa5, 0x54, 0x85, 0x2, 0x2d, 0xf8, 0xa1, 0xd7, 0xc1, 0x60, 0x58, 0x93, 0xec, 0x7c, 0xf9, 0x33, 0x43, 0x4, 0x48, 0x40, 0x97, 0xef, 0x67, 0x2a, 0x27},
+				{0xb2, 0x12, 0xd0, 0xec, 0x46, 0x76, 0x6b, 0x24, 0x71, 0x91, 0x2e, 0xa8, 0x53, 0x9a, 0x48, 0xa3, 0x78, 0x30, 0xc, 0xe8, 0xf0, 0x86, 0xa3, 0x68, 0xec, 0xe8, 0x96, 0x43, 0x34, 0xda, 0xf, 0xf4, 0x65, 0x48, 0xbb, 0xe0, 0x92, 0xa1, 0x8, 0x12, 0x18, 0x46, 0xe6, 0x4a, 0xd6, 0x92, 0x88, 0xe, 0x2, 0xf5, 0xf3, 0x2a, 0x96, 0xb1, 0x4, 0xf1, 0x11, 0xa9, 0x92, 0x79, 0x52, 0x0, 0x64, 0x34, 0xeb, 0x25, 0xe, 0xf4, 0x29, 0x6b, 0x39, 0x4e, 0x28, 0x78, 0xfe, 0x25, 0xa3, 0xc0, 0x88, 0x5a, 0x40, 0xfd, 0x71, 0x37, 0x63, 0x79, 0xcd, 0x6b, 0x56, 0xda, 0xee, 0x91, 0x26, 0x72, 0xfc, 0xbc},
+				{0x8f, 0xc0, 0xb4, 0x9e, 0x2e, 0xac, 0x50, 0x86, 0xe2, 0xe2, 0xaa, 0xf, 0xdc, 0x54, 0x23, 0x51, 0x6, 0xd8, 0x29, 0xf5, 0xae, 0x3, 0x5d, 0xb8, 0x31, 0x4d, 0x26, 0x3, 0x48, 0x18, 0xb9, 0x1f, 0x6b, 0xd7, 0x86, 0xb4, 0xa2, 0x69, 0xc7, 0xe7, 0xf5, 0xc0, 0x93, 0x19, 0x6e, 0xfd, 0x33, 0xb8, 0x1, 0xe1, 0x1f, 0x4e, 0xb4, 0xb1, 0xa0, 0x1, 0x30, 0x48, 0x8a, 0x6c, 0x97, 0x29, 0xd6, 0xcb, 0x1c, 0x45, 0xef, 0x87, 0xba, 0x4f, 0xce, 0x22, 0x84, 0x48, 0xad, 0x16, 0xf7, 0x5c, 0xb2, 0xa8, 0x34, 0xb9, 0xee, 0xb8, 0xbf, 0xe5, 0x58, 0x2c, 0x44, 0x7b, 0x1f, 0x9c, 0x22, 0x26, 0x3a, 0x22},
+			},
+		},
+	}
+
+	for _, test := range tests {
+		t.Run(test.name, func(t *testing.T) {
+			res, err := MultipleSignaturesFromBytes(test.input)
+			if test.err != nil {
+				assert.NotEqual(t, nil, err, "No error returned")
+				assert.ErrorContains(t, test.err.Error(), err, "Unexpected error returned")
+			} else {
+				assert.NoError(t, err)
+				for i, s := range res {
+					assert.DeepEqual(t, 0, bytes.Compare(s.Marshal(), test.input[i]))
+				}
+			}
+		})
+	}
+}
+
 func TestCopy(t *testing.T) {
 	priv, err := RandKey()
 	require.NoError(t, err)