A gunman opened fire last night at a community college in Oregon, killing 13 people and wounding 20, in the latest mass killing to rock a US college, officials and media said.

A lone gunman armed with a shotgun and a knife opened fire in a Seattle university building, killing one person before a student subdued him with pepper spray as he tried to reload.

The gunman who killed seven people at a California religious university lined up his victims and shot them one by one, Oakland police chief said.

A gunman opened fire at a Christian university in California yesterday, killing at least six people and wounding three more, authorities said. Police say they have a suspect in custody.

A gunman opened fire at a Christian university in California today, killing at least six people.