A 17-year-old teen was knifed to death during a caught-on-camera clash with an older man outside an East Harlem Korean restaurant, police and witnesses said Saturday.

Victim Carlos Rivas and a 22-year-old friend had just made an order at K-Street Food near the corner of E. 108th St. and Second Ave. at 6:15 p.m. Friday when they came to blows with 62-year-old suspect Saul Sanchez, who was also a customer at the restaurant, cops said.

“It’s a fight for I guess nothing,” said Moon Shin, an employee of K-Street Food. “So sad. They maybe fight outside first. I don’t see.”

Shin, 66, was working the counter when all three men were in the small storefront eatery.

“[The older man] makes an order and pay and [he] walked out, but two young guys [were] pushing everywhere,” she recalled. “Then they [went] outside fighting.”

The horrific stabbing is hauntingly similar to the murder of on-duty postal worker Ray Hodges, who was knifed to death in a Harlem deli a day earlier during an argument over his spot on a sandwich line, cops said.

Harrowing video obtained by the Daily News shows Rivas and his friend wrestling with a man as they scramble out of the Korean restaurant.

Once they hit the sidewalk, the man grabs Rivas by the collar and stabs him in the chest and stomach before both fall to the ground.

“It was straight stabs,” recalled the co-owner of the Your Highness smoke shop next door to the Korean restaurant, who saw the fight on his surveillance camera. “[The man] was holding [Rivas]. He was holding him by his collar.”