A United Airlines flight bound for Honolulu suffered a right engine failure on Saturday shortly after departing Denver International Airport, scattering debris but returning safely to the airport, the Federal Aviation Administration said.
United said in a statement there were no reported injuries on Flight 328, which had 231 passengers and 10 crew on board.
Broomfield, Colorado police posted photos of pieces of debris from the Boeing 777-200 airplane but there were no immediate reports of any injuries on the ground. The FAA said it and the National Transportation Safety Board (NTSB) will investigate.
The images posted by the police department appeared to show large pieces of debris including an engine casing from the plane scattered outside a home and on a turf field.
A video on social media showed a cloud of black smoke being left by a plane.
"Something blew up," a man on the video can be heard saying.
"If you find debris PLEASE don’t touch it or move it. The @NTSB wants all debris to remain in place for investigation," the Broomfield police department said on Twitter.