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.
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