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From NBC News:
A law enforcement source told NBC News that three people were shot and one person possibly suffered a heart attack.
NBC station KPRC-TV reported that police had one person in custody and were searching a subdivision near the North Harris campus of
Lone Star College to determine if another person who fled the scene could be a possible suspect.
Live aerial video taken by the station showed emergency crews moving two people on stretchers into ambulances. KPRC reported that two patients were brought to Ben Taub General Hospital.
Police officers in SWAT gear were shown on the video entering buildings on the campus and bringing out students.