FOUR people, including an armed suspect, died after a police standoff at a Colorado townhouse, authorities have said.
Police Sgt Cassidee Carlson said a police special weapons team was called after gunshots were heard at the Aurora, Colorado, home at about 3am. Investigators said three victims, all of them adults, appeared to have been killed before officers arrived.
Sgt Carlson said the suspect shot at officers at about 8:15am and was killed during a gunfight about 45 minutes later when police entered the home. It remained unclear if officers shot the suspect or if he shot himself. A motive for the killings also was unknown.
"We're just getting in there with our crime scene detectives, so obviously we'll have to determine if it was our rounds or his rounds," Sgt Carlson said.
A fifth person escaped uninjured before officers arrived and reported that she saw three people inside the home who "appeared lifeless". The sergeant declined to elaborate on the woman's escape.
Police declined to release the name of the suspect or the victims.
Violence marred Aurora and put the Denver suburb under a global spotlight nearly six months ago when a gunman's rampage inside a cinema left 12 people dead. They had been attending a midnight screening of the 'The Dark Knight Rises'.