Federal Polytechnic Mubi students killed in Nigeria

Some 25 people, mostly students, have been killed by unknown gunmen in Mubi, north-eastern Nigeria, police say.

Police spokesman Mohammed Ibrahim told the BBC that 22 were students, whom the attackers had called out by name.
A local resident said at least 40 people had been shot dead or stabbed.
The killings come days after a major operation against the Boko Haram militant group in the town, while others have linked them to a dispute over student union elections.
There has been a history of violence in Nigerian student elections but if confirmed, this would be the most deadly such incident.
BBC Nigeria correspondent Will Ross says mobile phone masts in the area were recently attacked by Boko Haram militants, so getting information from Mubi is difficult.
'Everybody is scared' The Adamawa state police spokesman, who had just visited the scene, said investigations were under way and the motive for the attack was not yet clear.
But he said the attackers had inside knowledge: "The attackers called the victims by name and killed them."
Mr Ibrahim said two of the dead were security guards and the other an elderly resident.
A resident, who did not want his name to be used, told the BBC's Hausa service that men in military uniform went to a hall of residence away from the Federal Polytechnic Mubi campus just before midnight, got the students out of their rooms and ordered them to say their names.
Some were then shot dead and others stabbed with knives, and their bodies left in lines outside the buildings.

He said it is not clear why some were killed and others spared - some of the dead were Muslims and others Christian.