Gunmen have stormed a university compound in north-eastern Kenya.Heavy gunfire and explosions have been heard at Garissa University College near the border with Somalia.
Local media say that two policemen and a student have been injured and rushed to hospital, and Kenyan defence forces are said to have arrived at the scene.
It is not clear who is responsible for the attack, but Somali al-Shabaab militants have frequently targeted Kenya in the past few years.
There are reports that hostages have been taken by the gunmen but this has not been confirmed.
Witnesses have told local media that the attackers struck during morning prayers at the college mosque.