BROOKLYN - The FBI said last night that it received credible threats against New York. The city is ramping up security even more as the 9/11 anniversary approaches.

Counterterrorism officials described the threats of a potential terrorist attack as credible, specific, but unconfirmed. The attacks are supposed to be aimed at New York or Washington, D.C. for the 10th anniversary of 9/11.

Officials say the information came in late Wednesday night and was so specific that it could not be ignored. It indicated that al-Qaida planned to use car bombs to blow up bridges or tunnels in New York or Washington.

Mayor Bloomberg says police will ramp up security throughout the city, and he is urging everyone to be more aware of their surroundings, but wants residents to go about their business.

The mayor says if you see something suspicious you should call 311 and if you see something dangerous you should call 911.

Officials chase unconfirmed al-Qaida bomb plot