4 Dead In Colorado Townhouse Shooting

January 5, 2013 Updated Jan 5, 2013 at 2:15 PM EDT

By WKBW News

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4 Dead In Colorado Townhouse Shooting

January 5, 2013 Updated Jan 5, 2013 at 2:15 PM EDT

Aurora, CO. (ABC News) - Four people were killed, including the gunman, during a hostage standoff this morning at a townhouse in Aurora, Colo., police said.

Police pumped tear gas into the home in an attempt to get the gunman to leave, and then went into the home and shot him, ABC News Denver affiliate KMGH-TV reported.

The three people found dead in the home are believed to be relatives of the shooter, Aurora Police Sgt. Cassidee Carlson told KMGH. A fourth person was found unharmed, she said.

Officers responded to the home after the first reports of gunshots came in around 3 a.m.

Carlson said neighboring residences were evacuated while the SWAT team attempted to resolve the standoff.

The Colorado town was the site of a movie theater massacre last July. A gunman opened fire during a midnight screening of "The Dark Knight Rises," killing 12 people and injuring 58 others.