Denver police are investigating a suspicious death after responding to a call about a man barricaded in a downtown apartment.

Police released few details Monday evening. Department spokesman Tyrone Campbell said he didn’t know what prompted the original call to police about the barricaded man, how the barricade call led to a death investigation or where the body in question was found.

“It’s really early into the investigation,” Campbell said.

Officers arrived at 4:56 p.m. at the apartment building at 1255 19th St., in the Union Station neighborhood. A man barricaded in an apartment refused to come out for an hour before surrendering to police, Campbell said.

The case then turned into a death investigation, though Campbell couldn’t say how or why. He also did not know the deceased person’s gender or age.

The man was taken into custody in connection to the barricade situation. The man is not currently held in connection to the death.