After hours of failed negotiations, police entered the house and shot the gunman. Once inside, they discovered three other bodies, presumed to be killed before police arrived on the scene, the Associated Press reports.
A fourth hostage escaped unharmed and alerted authorities, according to USA TODAY.
AP also reports that a SWAT team was called around 3 a.m. on Saturday after gunshots were heard at the home. It wasn’t until 9 a.m. when the gunman exchanged fire with police that officers entered the house.
In July, Aurora made headlines when a gunman opened fire in a crowded movie theater, killing 12 people and wounding 58 others.