NEW YORK - (AP) - Some local law enforcement agencies in the U.S. were adding security measures Monday following Osama bin Laden's death, out of what one called "an abundance of caution."In Los Angeles, police were stepping up intelligence monitoring,and New Yorkers will see extra police at their airports, bridgesand the World Trade Center site itself.

The Port Authority of New York and New Jersey said it will addmore police at the facilities it runs, which include the airports,the George Washington Bridge and ground zero. The measures aren't aresponse to any current threat and all the facilities will operatenormally otherwise, the Port Authority said."This response is not based on a current threat, but out of anabundance of caution until we have the chance to learn more," theagency said.Eighty-four Port Authority employees died in the attack on theWorld Trade Center on Sept. 11, 2001.New York Police Commissioner Ray Kelly issued a message to allpolice commands reminding them that while there's no informationindicating a specific threat to the nation's biggest city, officersshould remain alert.In Los Angeles, a top counterterrorism commander said policewill be stepping up intelligence monitoring. Assistant Commanding Officer Blake Chow, who heads thedepartment's counterterrorism and special operations bureau, saidSunday night that officers will be keeping a close ear onintelligence buzz to develop immediate response plans accordingly.Police in Philadelphia were on heightened alert, checking onmosques and synagogues every hour, Lt. Raymond J. Evers said.