Colton Tooley, Identified As University Of Texas Shooter (PHOTOS)

Colton Tooley, 19, was a mathematics sophomore at the University of Texas and reports are saying that he acted alone.

Colton Joshua Tooley, wearing a dark suit and a ski mask, opened fire with an assault rifle Tuesday on the University of Texas campus before fleeing into a library and fatally shooting himself, authorities said. No one else was hurt.

* He was 19 years old.

* He was pursuing a bachelor's degree in mathematics at the College of Natural Sciences.

* His address is listed as 3209 Western Drive, Austin, Texas 78745. The Statesman reports that 'the street, a cul de sac, is blocked off with police tape at the corner. There are two police cruisers blocking the street, a crime-scene truck and an unmarked police car.'