Update 5:14 p.m.: Local police official Major Armando Te'o just confirmed it was an argument between two men that sparked the shooting, and that one of the two men had a student I.D. on his person. The shooting victim who was caught in the crossfire was a school maintenance worker.

Update 3:55 p.m.: KHOU reports the second suspect in the shooting was found at a nearby hospital after turning up to receive medical attention for a gun shot wound. CNN is also reporting one person on the scene suffered a heart attack. So, of the three people injured two were reportedly from gun shots and one suffered a heart attack. 

Update 3:32 p.m.: The Lone Star College campus is no longer on lockdown

Update 3:23 p.m.: There are currently three people injured after one or more shooters opened fire on the Lone Star College campus in North Houston on Tuesday. One suspect is in custody while another has fled campus. Police are currently searching the area with help from ATF officials.

KHOU reports the campus is now secure. Officials say the campus is secure now. A student who saw the shooting take place just told KHOU two students were arguing and about to get into a fight when one student started to walk away from the confrontation. Suddenly, that student turned back around and fired about nine shots. The shooter "emptied his clip," the student said. 

Update 3:12 p.m.: The Houston Chronicle fills in some important details: one of the victims is in critical condition, and the shooting took place around 12:20 p.m. this afternoon. 

Update 2:54 p.m.: There are conflicting reports on the location of the shooter. A campus spokesperson told CNN the outstanding shooter is not believed to be on campus anymore. KHOU is reporting the shooter is still believed to be on campus. 

Update 2:46 p.m.: A campus spokesperson told CNN two victims were caught in the crossfire after an argument between two men resulted in guns being drawn, and one victim was a shooter. 

Update 2:34 p.m.: KHOU reports 10 ATF agents are on the way to help search for the second gunman. There are unconfirmed reports that one of the wounded is a teacher. 

Update 2:24 p.m.: Two people just told KHOU that the shooting occurred when two students were fighting in the school and pulled guns on each other, so it doesn't seem to be a premeditated attack. One of the three people shot is believed to be one of the suspects. KHOU is streaming live here

Original post: There are currently three people who appear to be injured after one or more shooters opened fire on the Lone Star College campus in North Houston on Tuesday.

A campus spokesperson confirmed to ABC 13 early this afternoon that shots were fired on the Lone Star campus. Three people appear to be injured, two women and one male. Local CBS affiliate KHOU reports that one suspect is already in custody and one is still outstanding. Students are being ushered into the wooded area near the school for safety, and the campus is on lockdown. KHOU just reported the shooting took place in the school administration building, and then one shooter retreated to the library. S.W.A.T. teams just arrived on campus, but much remains unknown about the scene, including weapon details or confirmation on the shooters and victims.

One student tweeted this photo from her class room

This is a photo of one victim being loaded into an ambulance on a stretcher:

This is a shot of the students evacuating the school: 

We'll keep updating this post as we learn more.