Two fighter jets scrambled over central New Jersey after two small planes violated airspace restrictions in place because of the U.N. General Assembly meeting.

The F-22s intercepted the small planes during two separate incidents over central New Jersey around 11 a.m. Tuesday, said John Cornelio, a spokesman for the North American Aerospace Defense Command.

The pilots did not respond to the radio, and they were forced to land at Central Jersey Regional Airport in Hillsborough, said Cornelio, who did not say whether the pilots were detained.

The temporary no-fly zones were established around the New York City metropolitan area because of the U.N. meeting, said FAA spokesman Jim Peters.

President Barack Obama addressed the gathering.