As many as two gunmen are thought to have invaded the Lone Star College's North Harris Community College Campus Tuesday and shot at least three people there at 12:20pm according to sources out of Texas.

The incident occurred about 20 miles to the north of Houston.

The police have one suspect in custody and police are searching a wooded area nearby for a possible second shooter. The searchers are utilizing tracking dogs. The police describe the man they are looking for a standing 6-foot-2 and wearing a Falcons cap.

CBS affiliate KHOU say that a man was brought out of the college’s library on a stretcher. According to their reports, the man on the stretcher is handcuffed to it.

Two of the wounded were taken to the Ben Taub General Hospital. Information on the third victim has not been released.

The shooting prompted the lockdown of the college as well as other schools in the area, including Parker Intermediate, Dunn Elementary, Nimitz High School and the Nimitz Ninth Grade Campus.

Alerts were sent to students and faculty warning them to not approach or enter the campus until notified further.