(Compass) – Numan, a town in the northern state of Adamawa , Nigeria , remains under siege following major religious clashes there. On January 28, a Christian woman was shot death by soldiers deployed to the town to keep order. Christian leaders say the killing, combined with the state governments ouster of Numans Christian monarch and its failure to prosecute a Muslim fanatic who killed a female Christian evangelist in the town 19 months ago, amounts to persecution. Meanwhile in the northern city of Kano , the family of Yusuf Olawale, 27, reported him missing and believe he may have been killed. The family has not heard from him since his arrest by Islamic law enforcers on May 13, 2004, on allegations that he breached sharia, the Islamic legal code.