A gunman has reportedly barricaded himself inside an Aurora, Colo., home and is holding multiple hostages.
Reporter Melissa Blasius is on the scene.
The Aurora Police Department has started to provide updates via Twitter.
Twitchy will monitor this developing story and update as more information becomes available.
Reports are coming in that at least one person was shot:
Awful. Blasius reports that four people, including the gunman, have been killed.