The U.S. ambassador to Thailand warned Friday there is a "real and very credible" threat of a terrorist attack against American citizens in Bangkok, AP reported. Ambassador Kristie Kenney was elaborating on an "emergency message" sent by the embassy to American citizens earlier Friday warning of a possible terrorist attack. The message said that "foreign terrorists may be currently looking to conduct attacks against tourist areas in Bangkok in the near future." It urged Americans to "keep a low profile" in public and to exercise caution in areas where Western tourists gather. The statement gave no other details. -- SPA