U.S. police shuts down the American University while they hunt for a suspected gunman.
The Washington, D.C. school's website said it was in a lockdown for about two hours.
The university said the suspect was in custody, and the D.C. police have reported there were no injuries caused to anyone.
No details about the suspect were immediately available.
Suspected gunman in U.S. university causes lockdown (0:26)
Dec. 12 - American University campus shuts as police hunts for suspected gunman. Sophia Soo reports. ( Transcript )