At about 5 a.m., fire crews responded to the 3800 block of Hilton Road, according to the Baltimore City Fire Department.
When firefighters arrived at the scene, they found the first floor of a rowhome on fire.
Inside, emergency personnel found a man who had suffered a heart attack.
The man was treated by medical personnel at the scene then taken to Sinai Hospital, where he was pronounced dead at about 6:30 a.m.
Authorities have not yet released the man’s age or identity.
The cause of the fire is now under investigation.