All seven attendants on a United Airlines flight from Newark to Los Angeles walked off the plane because they feared it was the target of a terrorist bombing, forcing the airline to cancel the flight, officials said.

The attendants on United Airlines Flight 49, scheduled to leave Newark at 9:45 p.m. Tuesday for Los Angeles, were briefed by members of the cockpit crew on a bomb threat received by the U.S. Embassy in Oslo, Norway, a spokeswoman for the Association of Flight Attendants said Friday.The attendants were told the embassy received a threat against an unidentified U.S. airline on a Jan. 3 Newark to Los Angeles flight.