At least 30 people have been killed by suspected Islamist militants in Borno state in north-east Nigeria, officials say.

Borno state's spokesman said many of those killed had been stopped on the road at a checkpoint in the village of Auno.

Many women and children had been abducted, Ahmad Abdurrahman Bundi said.

More than 20 vehicles are reported to have been burned.

The Islamist group Boko Haram and a local branch of the Islamic State group carry out many attacks in the area.