New York police are stepping up security at the city's landmarks after uncorroborated reports from the FBI of terror threats.
According to the New York Police Department, the information which the FBI has passed along is general in nature. But police have heightened security at landmarks such as the Statue of Liberty and the Brooklyn Bridge, and bridges and tunnels.
Police have already begun spot checks on vehicles entering the city.
Sources stress that the information, which reportedly comes from detained members of Al- Qaeda terrorist group, is unspecific and uncorroborated.
The New York Police Department released a brief statement saying "We are taking all necessary precautions and are communicating with the appropriate law enforcement agencies on both the state and federal levels. It is our policy not to comment on any details relating to threats or our response as it could undermine our counter-terrorism operations."
Earlier in the day, however, Police Commissioner Raymon Kelly stressed New York is preparing for all eventuality. "We are engaged in a comprehensive counter-terrorism program," he said. "We are training our personnel. We have had 2,000 people trained somewhat in-depth. Obviously we have more to go."
Thousands of military personnel are arriving in the city for the annual gathering of naval staff and ships known as "Fleet Week." Restrictions have been put in place around the vessels and security zones have been increased to keep vessels at a distance from landmarks, the United Nations and bridges, tunnels and piers until at least the end of the long Memorial Day holiday weekend, which begins Friday.