Police are hoping someone will identify the man seen walking down a street on the East Side last weekend.
Investigators say he's held up at least four people on the street at gunpoint since Sunday.
The first robbery happened on Sunday at 4:20 a.m. in front of 213 East 88th Street. The victim was a 51-year-old man.
Just an hour later, the suspect held up a 25-year-old man at 5:20 a.m. in front of 333 East 70th Street.
The following day, on Monday September 24th, a 42-year-old woman was robbed at 2 a.m. in front of 320 West 55th Street.
The most recent robbery happened just 10 minutes later in front of 340 West 55th Street.
None of the victims were hurt.
Get Eyewitness News Delivered