At about 6 a.m., police received a report of a person down on Ellis Street between Powell and Stockton streets, police spokesman Officer Gordon Shyy said.
Officers arrived and began giving the man CPR, and he was later pronounced dead at the scene by paramedics, Shyy said.
The death is considered suspicious and is under investigation, he said.
Shyy did not have details on exactly where the man was found but said he was not in the middle of the street.
