Islamic Boko Haram militants suspected of carrying out early morning massacre.
Molima Idi Mato, of the Yobe state College of Agriculture in rural Gujba, said the gunmen also torched classrooms in the attack at about 1am .
The college is about 40km from the scene of similar school attacks around Damaturu town. He said security forces are still recovering bodies so he could not give an exact death toll. About 1,000 students have fled.
North-east Nigeria is in a military state of emergency against an Islamic uprising prosecuted by Boko Haram militants who have killed hundreds of civilians in their quest for an Islamic state.
Boko Haram killed 27 villagers in two attacks in the same region earlier this week, a government official said, as violence continued to flare in the face of an army crackdown on the militants.