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IRVING -- Police say two people were killed when a man opened fire at North Lake College in the Las Colinas area of Irving.

Irving police have confirmed that three shots were fired on the campus Wednesday just before noon.

Two people are dead, police confirmed, including the suspected gunman. He was described as being a white man with a buzz haircut, who was wearing an orange tank top, and black jacket. He was armed with a handgun. 

The school tweeted that the school us under lockdown and advised students to go into the nearest classroom and hide. 

One student spoke with WFAA and said she was in the C Building when she heard three gunshots before running out of the school.

Another witness said officers with high-powered rifles were going room-to-room.

A student named Mike spoke to WFAA and said he heard people yelling in a hallway, and a man entered the room he was in, turned off the lights, and locked the door. He also heard police officers telling people to get down. He said officers then entered the room and had students leave with their hands over their heads.

One man told WFAA he didn't hear back when he texted his brother, so he drove up to the school. He eventually heard back from him and determined that he's safe.

Some students have taken to social media to talk about the incident:

The Irving Independent School District says nearby Singley Academy and MacArthur High School are also under lockdown, but there are no known threats to either campus.

"We will do everything we can to keep our students safe," Leslie Weaver with IISD said.

DART announced that all Orange Line trains aren't serving North Lake College Station at this time due to police activity. A bus shuttle has been placed between the Belt Line and Irving Convention Center Stations.

Check back for more on this developing story.