Texas Medical Center authorities are sending out an alert, warning people about an attack that happened in a parking garage.

Police say Edward Johnson assaulted an M.D. Anderson employee in Parking Garage 10 on Friday morning. The victim was able to fight Johnson off.

Police are warning workers that Johnson could still be a danger and he may be armed.

Johnson, 31, is a black male about 6 feet tall and weighing 145 lbs.

If you see him, you are urged to call the University of Texas Police Houston at 713-792-2890 or 911.