Authorities Search JFK Flights After Credible Terror Threat

No explosives were found aboard Emirates Airlines Flight 201 after a search, FBI spokesman Richard Kolko said. He said the plane flew in to John F. Kennedy Airport under escort as a precaution.  Earlier in the day, bomb squad searched for suspicious packages from Yemen at Newark Airport and in Brooklyn.

President Barack Obama called the coordinated attacks a "credible terrorist threat." Packages were found aboard cargo planes in Dubai and England and U.S. officials said they were increasingly confident that al-Qaida's Yemen branch was responsible.

The Emirates Airlines plane, a Boeing 777, landed shortly after 3:30 p.m. Passengers walked off the jet on two covered stairways and onto the tarmac, dragging their luggage behind them. Several police cars surrounded the airliner.

Kolko said the action was being taken solely because the plane, which took off from Dubai, was also carrying cargo from Yemen.

"The single piece of cargo will be examined. There is no known threat associated with this cargo," Kolko said.