At least one person is dead and several others are injured in a stabbing attack on the University of Texas campus Monday.
Austin police say 21-year-old student Kendrex J. White is in custody, but there is no word about a possible motive.
Police said White was armed with a hunting knife but did not resist when officers ordered him to the ground at gunpoint.
Emergency services said three people were taken to a hospital with "potentially serious injuries." There also were reports of additional patients with non-life-threatening injuries.
Student Rachel Prichett said she was standing in line at a food truck outside a gym when she saw a man with a large knife approach the person standing behind her.
"The guy was standing next to me," Prichett said. "He grabbed him by the shoulder and shoved the knife in it. I just started running as fast as I could."
Authorities cordoned off the scene as a large contingent of state and local police, including officers in helicopters, swarmed the area.
The University of Texas is blocks from downtown Austin and the Texas Capitol, and is one of the nation's largest universities.
The attack occurred in the central campus, just a short walk from the administration building and the landmark clock tower that was the scene of a mass shooting in 1966.