A college in the US state of Texas is on lockdown amid reports of a shooter on the campus.
Gunfire reportedly rang out on the campus of Lone Star College in the north of Houston.
Jed Young, a spokesman for the college, said students had been warned to take shelter.
There are unconfirmed reports of people injured. News helicopter footage showed ambulances at the scene and police swarming over the campus.
Students told local broadcaster KTRK that they had heard shots near the college's cafeteria.