SUSPECTED  militants from Islamist group Boko Haram have killed 15 people and wounded six others in a grenade attack on a camp for displaced people in northern Cameroon, a security source and a local official told Reuters. In the early hours, assailants threw a grenade into a group of sleeping people inside the camp in the village of Nguetchewe, said district mayor, Medjeweh Boukar. The camp is home to around 800 people, he said. The village is located in the Mozogo district, close to the Nigerian border in the Far North region. Boukar was informed by residents that 15 had…