Federal agents raided a house Tuesday, but wouldn't comment on television reports that the investigation was connected to terrorist threats.

Stations quoted neighbors as saying that the house, which had been searched two other times since the Sept. 11, 2001, attacks, was once the residence of a Middle Eastern family. The TV reports said the family moved within days of the attacks on the World Trade Center and the Pentagon.

FBI spokeswoman Judy Orihuela said from the scene that a sealed search warrant was served. She declined further comment on the warrant, and also declined comment on the media reports.

From television news helicopters, FBI agents were seen using metal detectors in the front yard and digging in the back yard. Agents were also seen bringing a trailer and a boxes to store evidence.

Neighbors also told the television stations that the family moved out abruptly and paid all of their bills in cash, including homeowner association fees.

Greenacres City is eight miles southwest of West Palm Beach.

At least 15 of the 19 hijackers involved in the Sept. 11, 2001, attacks had ties to Florida, with some seeking flight training here.