Caught on camera: NYPD searches for suspect in attempted robbery of 75-year-old man

Police are searching for a suspect who attempted to rob a 75-year-old man in Queens. 
Video shows the victim walking with a cane on 97th Avenue and 80th Street when another man approaches him. The suspect pushes the man against a fence and then to the ground. 
The NYPD says the suspect pulled out a knife and went through the victim's pockets, but didn't steal anything.
The victim was taken to the hospital and is expected to be OK. 
Anyone who has information on the incident is asked to call police.