A man and a woman were found dead Wednesday in a Montlake home that had been on fire, according to Seattle police.

Around 8:30 a.m., the Seattle Community Safety and Communications Center received a 911 call from a home in the 2200 block of 25th Avenue East, according to a report from the Seattle Police Department. During the call, operators heard a man yelling and a woman apparently in distress.

When officers arrived at the home and attempted to contact the man, he told them he was armed and refused to exit the residence, according to the report. The man said a woman inside the house was injured, and when police entered, the man “barricaded himself inside a room and showed police he was armed with a knife,” the report said.

Inside, officers found the building was on fire.

The Seattle Police Department’s SWAT team located one dead person in the house, the report said. Later on, firefighters located a second dead person, a woman, inside the home.

Four officers were transported to Harborview Medical Center to be treated for smoke exposure. An investigation into the incident is ongoing.