Female suicide bomber attacks teacher college in Nigeria ABUJA, Nigeria, Nov. 13 (UPI) -- A female suicide bomber attacked a teacher training college in northwestern Nigeria on Wednesday. It is unclear how many were killed. Some witnesses said only one had been killed while lecturer Andrew Randa told the BBC he saw four bodies. At least seven people were injured. The attack occurred around 12:30 p.m. at the Federal College of Education Kontagora in Niger State. "She tried to enter the class but before she could reach the door the bomb concealed in her dress exploded," said student Abashe Ado. Police are investigating the attack, which has been blamed on Boko Haram. Although the militant Islamist group has conducted attacks in Niger State, the town of Kontagora has largely been untouched by the group. Wednesday's bombing comes two days after a suspected Boko Haram suicide attack at a government secondary school in northern Yobe State killed at least 49 students and wounded 86.