New York subway terror plot warning

The FBI has received a “plausible but unsubstantiated” report that al-Qaida terrorists may have discussed attacking the New York City subway system during the Thanksgiving holiday weekend, US authorities said today.
Department of Homeland Security spokesman Russ Knocke said the FBI warning to New York law enforcement agencies was issued as a routine matter, but added that there may be an increased police presence in New York and other large metropolitan areas this weekend.