At least 23 people have been killed and 108 injured in a series of suspected suicide bombings in Maiduguri, the capital of Nigeria's north-eastern Borno state, police say. A post office, a popular weekly market, and the University of Maiduguri Teaching Hospital were hit within minutes of each other at around 19:30 local time (18:30 GMT) on Monday. The sites, which are among the city’s busiest locations, had drawn large crowds after the day’s Ramadan fast was broken. Monday’s explosions represent one of the deadliest attacks Maiduguri had witnessed in years. The city was once the epicentre of an insurgency by militant Islamist group Boko Haram but had been enjoying a relatively stable period after intensified military operations had pushed armed groups into remote border areas. Preliminary investigations revealed that the incidents were carried out by suspected suicide bombers. Witnesses described panicked scenes as loud explosions rang out, with residents urging each other to flee. Nigerian President Bola Tinubu condemned the attacks, reiterating that the country will not succumb to fear and vowing to locate and confront the attackers. The recent violence has left residents shaken as they had cautiously begun to believe that the worst of the insurgency was behind them.