Police have released CCTV images of a man in connection with a string of indecent assaults in Surry Hills on Friday morning.

Four women were approached and indecently assaulted in four separate incidents by an unknown man walking in Surry Hills between 5am and 7am, police said.

Image of man in Surry Hills released by police in connection to indecent assaults. Credit:NSW Police

The incidents occurred on Belmore Street, Reservoir Street, Crown Street and the corner of Foveaux and Elizabeth streets.

The women were not injured and officers from Surry Hills are investigating the matter.