By CBSNewYork Team

NEW YORK (CBSNewYork) — Police are searching for the suspects behind a pair of robberies in Manhattan.

The first incident took place shortly after 1 a.m. on May 21 near Penn Station.

READ MORE: Attorney Says Current Whereabouts Of Brian Laundrie, Gabby Petito's Fiancé, Are Unknown

Police said at least two suspects walked up to a 43-year-old man and struck him in the head, knocking him unconscious. They allegedly stole his money and iPhone before taking off.

READ MORE: Teen Stabbed To Death After Dutchess County High School Football Game, Former Student Charged

(Credit: NYPD)

The victim was taken to an area hospital for treatment.

Two days later, police said three suspects robbed two men at gunpoint in Hudson River Park. They made off with a chain, phone and credit cards.

MORE NEWS: Caught On Video: Carmine's Hostess Attacked After Asking Tourists For Proof Of Vaccination

Anyone with information about the robbery spree is asked to call the NYPD’s Crime Stoppers hotline at 1-800-577-TIPS (8477), or for Spanish, 1-888-57-PISTA (74782). You can also submit a tip via their website or on Twitter, @NYPDTips. All calls are kept confidential.

CBSNewYork Team