HOUSTON Authorities say the shooting at a Texas community college was the result of an altercation between two people, and at least one was a student.
Harris County Sheriff's Maj. Armando Tello says both people involved in the altercation were wounded and hospitalized. He says a college maintenance man was injured in the crossfire and also taken to a hospital.
Tello says a female who had a student ID also was hospitalized for a medical complication.
The shooting happened before 1 p.m. Tuesday at the Lone Star College System campus about 20 miles north of downtown Houston.
The school's official Twitter feed said earlier the shooting was between two people and that the situation was under control. It had issued an alert on its website earlier, telling students and faculty to take immediate shelter or avoid the campus.
"I saw two dudes basically get into an altercation and the dude that shot, he basically got angry and started shooting the other guy," student Brittany Mobley told CBS affiliate KHOU Houston. "A lot of people heard a lot of shots."
One male was brought out of the library and handcuffed to a stretcher, according to eyewitnesses, KHOU reported.
Aerial footage from local television stations showed police cars and ambulances parked on the Lone Star College System campus about 20 miles north of downtown Houston. Emergency personnel could be seen tending to people on stretchers, while others ran from a building led by officers.
College spokesman Jed Young confirmed the campus was put on lockdown following reports of a shooter. The college issued an alert on its website telling students and faculty to take immediate shelter or avoid the campus.
Mark Smith, spokesman for the Harris County Emergency Corps, said earlier one of the four people taken to area hospitals was in critical condition.
Cody Harris, 20, said he was in a classroom with about six or seven other students waiting for a psychology class to start when he heard eight shots. He and other students looked at each other, said "I guess we should get out of here," and fled.
"I was just worried about getting out," Harris said. "I called my grandmother and asked her to pick me up."
The Lone Star College System has an enrollment of 90,000 students and six college campuses, according to its website. Its programs in Harris County include training to be a paramedic.
Mark Zaragosa said he had just come out of an EMT class when he saw two people who were injured and stopped to help them. Officers had not yet arrived, he said.
"The two people that I took care of had just minor injuries," Zaragosa told KHOU. "One gentleman had a gunshot to the knee and the (other) actually had an entry wound to the lower buttocks area."
Keisha Cohn, 27, who also is studying to be a paramedic, said she was inside a building about 50 feet away from where the shots were fired. She heard "no less than five" shots and started running.
She fled to the learning center, which houses computers and study areas. Eventually, a deputy showed up and escorted people out, she said. She left her car on the campus, which was evacuated and closed for the rest of the day.