A man has died after the roof of a building in West Bromwich High Street collapsed on Tuesday night.
The man, in his 30s, was confirmed dead by paramedics after he was discovered on the ground floor of the three-storey building which has an estate agent on the ground floor.
Detective Chief Inspector Danny Long said: "At the moment we can't tell what time this person died or where he was in the building when the roof collapsed.
"Obviously the roof went through not just the first floor but through to the ground floor. We don't know how far he fell. We can't say at this stage."
Police believe the man lived at the property.
Mr Long added: "We think we know who this person is. The family have been contacted, they are aware."
Four other men who were inside the building when the roof collapsed were accounted for. Two were rescued by fire crews, while two made their own way out.
The fire service spokesman described the incident as a "catastrophic failure" of the roof, adding: "The roof has collapsed inwards, which has caused the floors below to pancake downwards towards the ground floor."
The cause of the collapse is unknown.