Nigeria, Feb. 23 -- Two police officers reportedly lost their lives when some unknown gunmen in the early hours of Tuesday attacked a police station in Aba, Abia State, Nigeria's South-east.

The gunmen then carted away arms and ammunition from the station.

Two of the gunmen were, however, gunned down by police officers who tried to repel the attack.

The Commissioner for Information in the state, John Okiyi Kalu, who confirmed the incident, said the state government was offering N1 million reward to anyone with useful information that could lead to the arrest of the gunmen.

The government, following the incident, has announced an immediate ban on the use of tricycles and motorcycles from 7 p.m. to 7 a.m. in "all major cities" in the st...