The Federal Aviation Administration was investigating Sunday after lasers were pointed at two airplanes on the same runway at LaGuardia Airport the previous night.
Officials say a laser was pointed at a Jetlink flight that was landing around 6 p.m. Saturday and another was pointed at a United plane about an hour later.
Both planes were approaching the same runway at LaGuardia.
FAA officials said they were trying to determine where the lasers came from.
The agency said laser beams can temporarily blind or distract pilots, and federal law prohibits any interference with an aircraft pilot.