Following a request by Egypt, the region's foreign ministers will gather in Cairo on October 12 "to discuss Turkish aggression on Syrian territory", Hossam Zaki, the League's assistant secretary-general, said in a statement late Wednesday.

The announcement came after Turkey launched airstrikes and artillery fire along the border with war-torn Syria earlier in the day, drawing international condemnation.

Backed by Syrian militants, it pushed on with a ground offensive in Tal Abyad, an area under the control of the Syrian Kurdish People's Protection Units (YPG).

Ankara's attack follows an abrupt US policy shift which saw America withdraw its troops from positions in northern Syria, effectively greenlighting Turkey's military operation.

Zaki deemed the offensive "an unacceptable assault on the sovereignty of an Arab member state exploiting its situation... and violating international law".

In another statement earlier Wednesday, the League warned that the burgeoning attack "could help Daesh (the Islamic State group) regain some of its force".