Fireplaces have become increasingly commonplace in homes, businesses, and other buildings. A fireplace may provide many benefits, including the creation of heat as well as an aesthetically-pleasing arrangement of flames, sounds, and smells. A fireplace is typically mounted in a wall of a structure and includes one or more air passages running into and out of the fireplace. The plurality of passages creates an air plenum system. A portion of the air plenum system typically includes one or more air intakes coupled to passages used to take room air, or air from the room in which the fireplace is disposed, and direct the room air through passages running adjacent to the combustion chamber. The room air is heated as it passes adjacent to the combustion chamber and isA three-way sexual encounter led to violence, with a woman stabbing two men with a knife as they wrestled on the floor, Boulder authorities said.

The incident happened early Tuesday in a Murray Street home after two men returned from a local bar and had sex with a woman, the Sheriff’s Office said in a media release.

The woman, Serena Brooks, 30, of Niwot, has been arrested on suspicion of felony first-degree assault and misdemeanor child abuse, police said.

A 6-month-old child was home at the time of the incident, police said. The child was asleep and not injured.

Police identified the victims as 28-year-old Ruffin Griffin, Brooks’ husband; and Clint Cadigan, 27.

After being stabbed, the two men drove together early Tuesday to Boulder Community Hospital to be treated for their injuries.