Started at the Perry Castaneda Library

Update: Shooting at the University of Texas, one suspect dead, SWAT moves in on second building

Update: Shooting at the University of Texas, one suspect dead, SWAT moves in on second building

Early this morning a single shooter at the University of Texas at Austin opened fire at the campus' Perry-Castañeda Library, then took his own life.

With the shooting largely first reported via campus Twitter users, police are said to be looking for a second suspect due to conflicting physical descriptions. No injuries to anyone besides the confirmed first shooter have been reported. The campus is on lockdown as the police search for a possible second suspect.

The first Twitter reports about the library shooting started coming in a little after 8 a.m. UT officials sent out an e-mail to students, urging them to stay indoors and later officially cancelled all classes and closed the university for the day. A police spokesperson says the first shooter had an AK-47 assault rifle and was wearing a ski mask and all black clothes. One student told an Austin TV station that he was in the lobby of the library when the gunman walked in carrying the AK-47, and said that the gunman headed for the stairs, past a few dozen people, without firing a shot.

Reports of a second shooter center around Calhoun Hall. SWAT team and an armored tank are reported to have arrived at that building, with the SWAT team entering with dogs. Those on campus are advised to stay inside.

The University of Texas has been without incident for years, but was the site of one of the United States' most deadly school shootings on Aug. 1, 1966, when Charles Whitman killed 16 people and injured 31 others from his post atop a tower.

You can watch a live-stream of the situation here. For more on the search for the second suspect, read the latest

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Jay Janner tweeted: "The scene at the UT campus, which is under lockdown" Photo by Jay Janner/Twitter
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My Fox Austin maps the scene. Courtesy of My Fox/Austin
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From Twitter user Blakeley McCracken: "View of library from the McCombs Business School. Empty outside, but we're in lockdown. Lots of sirens." Photo by Blakeley McCracken/Twitter