The head of the Borno state emergency management agency, Ahmed Satomi, said the blast took place in the London Ciki area of Maiduguri, which has been at the epicentre of Boko Haram violence since 2009. "The mosque was being guarded by civilian JTF (joint task force militia) during prayers", he said.
Three persons were also killed and five others wounded in the third and fourth explosions, which occurred about 20 minutes later at Polo-Sabon Gari area of Maiduguri, according to the source, who said he helped in the evacuation of the victims from the scenes of the explosion.
No group has yet claimed responsibility for the explosions, but similar attacks in the past were claimed by Boko Haram militants.
A witness, Malam Muhammad Grema, who said he lost some of his friends in the attack, told NAN that the incident occurred at about 5:00 AM.
The incident, which comes a day after the police confirmed a separate attack had killed two children in the area, is yet to be confirmed by authorities.More news: 'War for the Planet of the Apes' races past 'Spider-Man'
It was gathered that the attackers cross the trenches in an attempt to enter the town at about 10:15 pm on Sunday.
Soldiers guarding the trenches shot the women as a result of which the explosive strapped to their bodies detonated, blowing them to pieces, the rescue coordinator added.
A check shows that the frequency of suicide bombing in Maiduguri, especially at the University of Maiduguri and environs since decimation of Boko Haram is becoming worrisome.
Multiple suicide attacks last Tuesday killed 17 people, mostly of them were local security personnel.
Only suicide bomber was killed in the incident, he said.