Four people including an armed suspect died during a lengthy police stand-off at a house in Colorado, the US.
The shootings occurred just four miles from Aurora Mall, where 12 people were killed and dozens injured by a gunman at a midnight showing of the Batman film The Dark Knight Rises on July 20. The man charged in that shooting, James Holmes, goes to court on Monday for a preliminary hearing in which prosecutors will lay out their case against him.
In the latest incident, an Aurora police department special weapons team responded after shots were heard at the house at 3am local time, said sergeant Cassidee Carlson. Investigators said three people, all adults, appeared to have been killed before officers arrived.
The suspect shot at police five hours later and was killed during a shoot-out when officers stormed the house about 45 minutes later. It is not yet known if officers shot the suspect or if he shot himself.
A fifth person escaped unharmed before officers arrived and reported that she saw three people inside the home who "appeared lifeless".
A motive for the killings has not been established.
Officers evacuated neighbours during the stand-off and used a megaphone to communicate with the gunman, urging him to surrender.