Published: Sep 28, 2010 5:28 PM EDT
Updated: Sep 28, 2010 1:00 PM EDT

AUSTIN, Texas - Police say someone opened fire inside a library on the University of Texas campus before shooting and killing himself.

Austin police say no one else was hurt. They say a man fired a semi-automatic weapon inside the library earlier Tuesday morning. They have not determined what sparked the shooting and they are continuing to look for a possible second suspect.

An email to UT students warned everyone on campus to seek shelter and to not emerge until an all-clear is sounded.