Police on Long Island and New York City stepped up patrols Saturday in response to unsubstantiated online threats about a truck packed with radioactive material.

Police stopped cars and inspected trucks at all entries to the city. They were equipped with a mobile radiation detector to help find a possible ?dirty bomb.? Police say the beefed up security measures were just a precaution. Officials say the city's terror alert status remains unchanged at orange because the online threats from an Islamic Web site have not been verified and are probably not true.

Congressman Peter King (R-Seaford) says even though it was an unsubstantiated threat, it is better to be safe than sorry. ?Police are doing exactly the right thing because all you need is one threat to be real and there would be thousands of people killed or wounded,? said King.

Police say they did not want to take any chances and therefore increased deployment of vehicle, marine and helicopter-mounted radiological sensors as well as those carried by NYPD personnel.

Efforts were scaled back Saturday evening.