Five people have reportedly been killed at a checkpoint of the Nigerian Drug Law Enforcement Agency (NDLEA) in the Muna area of Maiduguri, Borno State.
A female suicide bomber reportedly detonated her improvised explosive device (IED) at the checkpoint.
Lukman Umar, a witness, said three other female suicide bombers attempted to attack a public gathering at a commercial bus stop in the area.
He said the first bomber attacked a vehicle conveying charcoal.
Umar said five people were injured including her co-bomber, while the third bomber fell inside a pit in the process.
Her bomb was reportedly demobilised by the police bomb anti-ordinance personnel that arrived the scene later.
Umar added that those injured during the attack were rushed to an undisclosed hospital where they are currently receiving treatment.
The Borno state police command police is yet to confirm the attacks.