LONGMONT, Colo. (CBS News)-- Four people were found dead Tuesday in Colorado after a woman called police to report a shooting and was apparently shot to death while she was on the phone.
Weld County sheriff's spokesman Tim Schwartz says dispatchers heard the woman who called 911 scream "No, no, no," and then they heard a gunshot. Schwartz says a man grabbed the phone and said he was going to kill himself, and dispatchers heard another shot.
The bodies were found in a home in a subdivision east of Longmont, which is about 35 miles north of Denver.
The dead included two men and two women, including one who appeared to be in her late teens or early 20s.
Schwartz says investigators have a possible motive for the shootings, but he refused to release details.
Schwartz said he believed no one escaped alive. He did not know if all four of the people lived there, and he was not sure if there had been any previous calls to police asking for help.
A handgun believed to be murder weapon was recovered. Police said numerous rounds had been fired from the weapon, but further details were not available. Police are convinced the gunman was one of the victims.
Authorities were awaiting a search warrant to search the home.
CBS Denver helicopter video after daybreak on Tuesday showed crime scene tape surrounding the home where the crime happened. Christmas lights adorning the home were still illuminated, and there was a wreath hanging on the front of the home.