Nigeria: heavily armed men free inmates during attack on prison

Unconfirmed reports say nearly 1,000 inmates escaped from correctional facility in south-west of country

Gunmen have attacked a prison in south-west Nigeria, freeing about 575 inmates, officials said.

The third jailbreak in Africa's most populous country this year raises more concerns about how safe detention facilities are in the west African country where authorities have struggled to stem rising violence.