Six people are in custody following what Boulder Police are calling a SWAT situation Friday morning at an off-campus student housing complex.

Authorities say they're trying to find another person, but did not elaborate on why.

The incident unfolded at the U Club Apartments at 820 28th St. Officers first came to the area after receiving a call from a parent in another state.

Boulder Police said Friday afternoon they are executing a search warrant at the apartments. They've confirmed additional people likely aren't inside the unit where the SWAT activity occurred.

Details about this incident were sparse. Police didn't identify the six people who were arrested, or what charges they might face.

Drivers are asked to avoid the area due to police activity..