The US Embassy is warning of a possible terrorist attack on Indonesia's Bali island on New Year's Eve. The embassy sent e-mails to US citizens today quoting Bali's governor as saying there is an indication of an attack to Bali tonight. The governor called on people to be alert, but gave no details about a specific threat. Indonesia's counter-terrorism unit says it received the warning but could not independently verify its accuracy. The warning comes six months after twin suicide blasts killed seven people at luxury hotels in the capital, Jakarta.