Gunmen have attacked and burnt down a police station in Nigeria's south-eastern Abia state in continuing rising insecurity.

Police officials in the state confirmed the attack but denied reports that inmates had been freed from a holding cell.

Local media outlets had quoted sources saying inmates were freed by the gunmen.

Police have not confirmed reports that ammunition was stolen during the attack.

This attack come barely six hours after government drug law enforcement agency offices in the state were raided.