A pair of knife-wielding young robbers are terrorizing the Upper East Side, sticking up at least two people within an hour over the weekend, police said.

A 17-year-old boy was walking through Central Park when the two suspects approached him with a knife around 11:30 p.m. Sunday, punched him in the head and knocked him to the ground, stealing $150 from him before fleeing, police said.

An hour later, the fiends attacked a 73-year-old man as he was entering his home on East 81st Street and Second Avenue, according to police. The duo brandished a knife and took the man’s cellphone and $200, cops said.

Both of the suspects are described as male Hispanics between the ages of 16 and 20.