He said some of the injured ones had been given medication and are responding to treatment.
The attack is the latest in a series of intensified attacks carried by Boko Haram suicide bombers since March this year.
Suicide attacks by Boko Haram has become almost a daily occurrence around Maiduguri in the past three months.
The worsening trend prompted the Nigeria chief of army staff, Tukur Buratai to issue a 40-day ultimatum to the commanders of the counterinsurgency operations in the northeast to arrest the group’s leader, Abubakar Shekau, and also end the insurgency.
Acting President Yemi Osinbajo had this week ordered all the military service chiefs to relocate to the northeast to personally coordinate the war against Boko Haram.