Nigeria: Curfew, Search Against Attack in Potiskum Nigeria's military says it declared an all-day curfew and conducted house to house searches amid fears Islamic extremists armed with explosives infiltrated the northeastern Yobe state capital of Potiskum. Capt. Eli Lazarus announced the 24-hour curfew early Wednesday and ordered people to stay home. There was an eerie silence and empty streets in the normally bustling city as Muslims prepared to celebrate the end of the holy month of Ramadan on Thursday. A security official, who insisted on anonymity because he was not authorized to speak to the press, said the army was acting on information that extremists had infiltrated the city with munitions and explosives. Potiskum has been the target of previous attacks by extremists. Nigeria declared a state of emergency in Yobe and two other northeastern states mid-May.