There are reports that two people have been wounded in a shooting on the campus of Lone Star College in North Harris County.

The college is in lock down, one person is in custody and a second gunman is being sought.

Lone Star College System issued an alert on its website Tuesday telling students and faculty on its Houston-area campus in north Harris County to take immediate shelter or avoid the campus. Spokesman Jed Young says there are reports of a shooter.

Aerial footage from local television stations shows emergency personnel attending to some people on stretchers and at least one being taken into an ambulance. Others can be seen running from a building led by officers.

The Harris County Sheriff's Office says it has no immediate details.