A gunman shot dead six people and injured another at a birthday party in Colorado Springs before turning the gun on himself, Reuters reported Monday.
The attacker later died at the hospital, the Colorado Springs Police Department said. Sunday's incident appears to be the fourth deadliest mass shooting in Colorado's history.
Authorities said the gunman, the boyfriend of a female victim, drove to the trailer just after midnight Sunday where a birthday party was being held. Inside, he started shooting party guests before taking his own life.
Police said children at the trailer were not injured and are now with relatives.
The neighborhood, lined with mobile homes, is usually quiet, the Denver Post reported. One of the residents, Yenifer Reyes, told the paper she awoke early Sunday to the sound of gunfire.
"I thought it was a thunderstorm," Reyes said. "Then I started hearing sirens."
In 2015, a gunman shot three people to death before being killed in a shootout with police in Colorado Springs on Halloween.
About a month later, another gunman shot three people to death, including a police officer, and wounded eight others in a shooting at a Planned Parenthood clinic in the city.
The carnage was the latest in a resurgence of mass shootings in the U.S. after such occurrences seemed to subside during the peak of pandemic restrictions.
Colorado Gov. Jared Polis called the shooting a "terrible act of violence," occurring as "many of us are spending the day celebrating the women in our lives who have made us the people we are today," The Gazette reported.
