The Arapahoe County Sheriff's Office assisted in the search. The Bureau of Alcohol, Tobacco and Firearms and the FBI are on the scene. The Arapahoe County Bomb Squad arrived shortly before 10 p.m. Around 10 p.m. Sunday, investigators were taking boxes out of the house.
The Colorado Springs Police Department is taking over the investigation.
Two people, who are believed to be the homeowners, left with sheriff's deputies around 9 p.m.
Because police have not confirmed that the warrant is related to Sunday's shootings in Colorado Springs and Arvada, 9NEWS is not identifying the owners or address of the house.
9Wants to Know did call a business owned by one of the homeowners. A voicemail recording said the business would be closed for a week because of a "family emergency."
(Copyright KUSA*TV, All Rights Reserved)