It happened at a McDonald's on Fulton Street and Hudson Avenue in Downtown Brooklyn just after midnight Monday.
The suspect apparently opened fire on two men, striking them and shooting the windows out of the restaurant.
A woman was also grazed by a bullet but refused medical attention from first responders.
The other victims, a 41-year-old and 33-year-old man, were taken to New York-Presbyterian Brooklyn Methodist Hospital.
The suspect, who is described as 5'5 man wearing a camel backpack, fled the scene on foot.
ALSO READ | Person of interest in custody in Central Park sex assault: sources
Person of interest in custody for sexual assault in Central Park
----------
* More Brooklyn news
* Send us a news tip
* Download the abc7NY app for breaking news alerts
* Follow us on YouTube