By ADAM GOLDMAN, Associated Press Writer

NEW YORK - Three people were arrested and one other was being sought Saturday in connection to a plan to set off explosives in a fuel line that feeds John F. Kennedy International Airport and runs through residential neighborhoods, officials close to the investigation said.

The plot, which never got past the planning stages, did not involve airplanes or passenger terminals, according to the two officials, who spoke on condition of anonymity because details of the arrests had not yet been announced.

The plot posed no threat to air safety or the public, the FBI said Saturday.

Details were to be given out at a 1 p.m. news conference.

The pipeline takes fuel from a facility in Linden, N.J., to the airport. Other lines service LaGuardia Airport and Newark Liberty International Airport.

A third law enforcement official said the suspects include a Guyanese man who used to work at the airport and was arrested in New York City on Friday night. Two other suspects were apprehended in Trinidad.

Investigators were seeking a fourth suspect in Trinidad.

The official said the plotters had conducted surveillance on giant jet fuel tanks at JFK and the pipeline. They had taken surveillance video of the targets and took it to Trinidad to review the tape, the official said, speaking on condition of anonymity because the arrests were not yet announced.

The official said investigators first found out about the plot in January 2006. After that, an informant infiltrated the group.

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