Kabul university attack: 12 killed as gunmen open fire on campus

Twelve people were killed in an attack on a university in Kabul, the Afghan capital, a spokesman for the Chief of Kabul Police.

Two gunmen who were still on the site were killed Thursday morning in a police operation.

Seven students, three policemen and two security guards were killed in the attack on the American University of Afghanistan in Kabul campus, Basir Mujahid, the spokesman said. Thirty students were injured in the attack, which no group has yet claimed responsibility for.

The gunmen detonated explosives and fired guns, witnesses said, causing some students and faculty to flee. Others hid inside buildings, a senior State Department official reported.

The first blast occurred at 7:50 p.m., when students were gathering and eating together.

Two professors, an American and an Australian, were abducted from the same university earlier this month. Their whereabouts remain

Despite its name, few Americans study at the school, a senior US State Department official told CNN. But a number of Americans serve on the faculty and may have been trapped inside buildings. The school is regarded as a symbol of cooperation between Afghanistan and the United States.