Gunmen in Nigeria have abducted students from a mixed boarding school in Kebbi state in the north-west of the country.

It is not yet known how many have been taken.

Armed men invaded the Federal Government College on Thursday and overpowered the police unit guarding the school. They then kidnapped students and teachers.

This is the second major abduction within 24 hours in the country. Nigeria has seen a spate of school kidnappings in recent months.

A local official told the BBC that they are currently carrying out a headcount to ascertain the exact number of people who had been taken.

This incident comes after another group of gunmen kidnapped four Chinese nationals near Lagos, in south-west of the country.

More than 130 children kidnapped from a Quranic school in Niger state last month are still being held.