CHICAGO (AP) – Police say the man who killed three people at a Chicago hospital fired his handgun at least 30 times before he fatally shot himself.

Chicago police spokesman Anthony Guglielmi says the gunman, Juan Lopez, spotted police and ran inside Mercy Hospital after he fatally shot his ex-fiancée, Dr. Tamara O’Neal, in the parking lot.

Once inside the hospital, Lopez shot pharmacy resident Dayna Less as she exited an elevator. Lopez then exchanged gunfire with police and killed Officer Samuel Jimenez.

Guglielmi says officers shot Lopez in the chest, but that he then shot himself in the head with a Glock semi-automatic handgun. He says Lopez was carrying only one gun and that he reloaded the weapon and fired it at least 30 times.