Jet makes emergency landing

2:55 p.m. Update: The jet, which was carrying 275 passengers and 16 crew members, was taken out of service and will be inspected to determine what caused the problem, said Julie King, a Continental spokeswoman.

A different plane was later put into service to fly the passengers to Narita International Airport in Tokyo.

Original post: Hydraulic problems forced a Tokyo-bound Continental Airlines plane to make an emergency landing at Newark Liberty International Airport.

No injuries were reported and the Boeing 777 was not damaged. But it was not immediately known how many passengers and crew were aboard the flight.

Continental Flight 9 landed safely at 12:20 p.m. Sunday, about an hour after it left Newark, said Steve Coleman, a spokesman for the Port Authority of New York and New Jersey, which operates the airport.

Federal Aviation Administration spokeswoman Kathleen Bergen said the plane returned to the airport due to "a hydraulic problem," but didn't provide further details.

She said the pilots spent about an hour burning off and dumping fuel before landing, a standard practice that makes the airplane lighter.

The incident follows a problem Saturday where a plane bound for Brussels was forced to return to Dulles after blowing a tire. That plane circled the Washington region while it dumped fuel. United Flight 950 landed safely, and airports authority officials said a damaged runway may have caused the problem.

-- Staff and wire reports