NEW YORK (CBSNewYork) -- The NYPD has released new surveillance footage of two men accused of robbing an 83-year-old man at knifepoint last week.

Police say the suspects followed the man into an elevator at a residential building on 21st Street and 36 Avenue in Astoria at around 6:45 p.m. Saturday. Once inside the elevator, police say one of the suspects pulled a knife and said to the victim: "don't make a noise."

Authorities say the second suspect took the victim's cell phone and $20 before fleeing the scene.

No injuries were reported.

Police are asking anyone with information about the incident to contact Crime Stoppers by calling (800) 577-TIPS, logging on to their website at www.NYPDCrimeStoppers.com, or by texting their tips to 274637 (CRIMES) and entering TIP577. Tips can remain anonymous.