A gunman opened fire Tuesday inside a University of Texas campus library then fatally shot himself, and police are searching for a possible second suspect, university police said.
A man opened fire with an automatic weapon on the sixth floor of the Perry-Castaneda Library early Tuesday, UT police spokeswoman Rhonda Weldon said.
"He subsequently shot himself. He is deceased," she said, adding that no one else was injured.
Police and university officials urged students to stay indoors.
"A suspected shooter in PCL library is dead. Police are searching for possible second shooter. Lock doors, do not leave your building," the alert said.
Weldon said there was no report that the possible second suspect may have been armed, but that police are taking all precautions and keeping the campus locked down.
Investigators are trying to determine what led to the gunfire at the UT campus at Austin, which is one of the largest in the country with nearly 50,000 students.
On Aug. 1, 1966, Charles Whitman went to the 28th floor observation deck at the UT clock tower and began shooting at people below. He killed 16 people and wounded nearly three dozen before police killed him about 90 minutes after the siege began.