Police bolstered security in subways and trains Wednesday after the government warned that al-Qaida suicide bombers were contemplating an attack on New York's mass-transit systems during the holiday season.
Federal authorities issue an unusually forceful warning about a possible terror plot against the New York City subway system during the holiday season
A Pakistani immigrant was arrested and convicted for a scheme to blow up the subway station at Herald Square in 2004. There was also a planned cyanide attack on the subways by al-Qaida operatives that authorities say was called off in 2002; another aborted al-Qaida plot to destroy the Brooklyn Bridge in 2003; and a plot to bomb underwater train tunnels to flood lower Manhattan, which was broken up in 2006 by several arrests overseas.
Police have no specific details to confirm that this plot has developed beyond aspirational planning, but Police are issuing this warning out of concern that such an attack could possibly be conducted during the forthcoming holiday season.