At least two people were wounded in a Tuesday shooting at Lone Star College in north Houston, according to initial reports.
Helicopter video, carried by CNN, showed at least one victim wearing a neck brace being wheeled on a stretcher to an ambulance.
CNN reported that a suspect was in custody but that could not be immediately confirmed.
Students were shown jogging away, with their hands up, as police entered a building on or near the campus. Students were later shown walking calmly as police vehicles remained massed around the campus.
KTRK-TV reported that officials were focusing on the campus' library. The station showed a victim being wheeled into Ben Taub General Hospital after the shooting.