Some 480 Nigerian soldiers have fled into Cameroon following fierce fighting with Boko Haram militants, Cameroon’s army has said.
Army spokesman Lt Col Didier Badjek said the soldiers had been disarmed and were now being accommodated in schools.
Clashes are said to be continuing in the border town of Gamboru Ngala.
Boko Haram on Sunday released a video in which it said it had established an Islamic state in the towns and villages it controls in north-eastern Nigeria.