Syria's Kurdish militia says it has repelled Turkish troops and their allies from villages they seized during the Turkey-backed offensive against the enclave.

The Syrian Observatory for Human Rights said on Monday that the U.S.-backed Kurdish militia has waged a ferocious counteroffensive, repelling Turkish troops and allied Syrian fighters from two villages they briefly captured

The Observatory says Turkey-backed troops opened two new fronts on the third day of the offensive, attempting once again to enter Afrin in northwestern Syria.

The Kurdish militia, known as People's Defense Units or YPG, says it's clashing with the Turkish troops northwest of Afrin.

Turkey considers the YPG a terror organization because of its affiliation to its own Kurdish insurgency. Turkish President Recep Tayyip Erdogan has promised to expand the operation.