The advisory was issued in a statement on Tuesday, following multiple suicide bombing attacks in Maiduguri on Monday evening.
The Nigerian Army has intensified security operations in Maiduguri, Borno, following multiple suicide bomb attacks on the metropolis.
President Bola Tinubu, in a statement on Tuesday, vowed that his administration would completely defeat terrorists causing mayhem across Nigeria.
Governor Babagana Zulum has condemned the bombings in parts of Maiduguri on Monday evening, describing the explosions as cruel and cowardly.
The police also advised the public to report any suspicious activity through emergency lines: 0806 807 5581 and 0802 347 3293.
The police said that suspected suicide bombers allegedly carried out the suicide attacks at 7:24 p.m..
Boko Haram launched the attacks in the early hours of Friday.
The terrorists reportedly stormed the military base in the early hours of Monday, burnt down the base, and carted away ammunition cartels.
Many people have been killed in Gwoza after Boko Haram insurgents raided a military base and attacked the community, the police say.
Troops have repelled coordinated terrorist attacks on multiple military locations in Borno, in which several soldiers were killed.
