Turkey has sent more tanks into the northern Syrian village of al-Rai to fight Islamic State extremists, opening a new front after its intervention last month against the group, state media reported on Saturday.

The tanks crossed into the village from the Turkish province of Kilis to provide military support to Syrian opposition fighters as part of Turkey's "Euphrates Shield", state-run Anadolu news agency said.

At least 20 tanks, five armoured personnel carriers, trucks and other armoured vehicles crossed the border after noon, Dogan news agency said.