A second United flight departing Newark Liberty International Airport in the last two days has had to return after an emergency.

The Federal Aviation Administration says United Flight 409 bound for Seattle returned to the airport at about 9:15 a.m. Sunday after reports of possible smoke in the cabin and cockpit.

No injuries were reported.

The emergency landing was the second in as many days at Newark. On Saturday night a United flight bound for Berlin had to return to the airport after experiencing engine problems.

On Sunday the FAA said that one of the engines on the Berlin-bound flight apparently overheated on takeoff. An agency spokesman says that contrary to published reports, the aircraft didn't blow a tire during takeoff.