New York Cites a Terror Threat

The New York Police Department, responding to new information that terrorists may be planning to attack corporations or large public institutions in the city, last night advised building managers and corporate security personnel to step up their procedures to guard against vehicles rigged with explosives and against chemical agents placed in ventilation systems.

The warning followed meetings on Friday night and yesterday between Police Commissioner Raymond W. Kelly and Pasquale J. D’Amuro, the assistant director in charge of the New York field office of the Federal Bureau of Investigation, according to Mr. Kelly’s chief spokesman, Paul J. Browne.

Mr. Browne said the meetings were held to discuss the latest reports of a terrorist threat against the city, but declined to comment on the source of the new information. “The information is considered credible,” said another law enforcement official, who insisted on anonymity. The official said the police and federal terrorism authorities, who have received similar threats before, were unusually concerned about the new information.

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