WASHINGTON - The US State Department has urged all US citizens in Indonesia to leave the country and ordered the departure of non-emergency US government personnel from there. The department also warned US citizens to defer travel to Indonesia. "The bombing of a nightclub and another in the vicinity of our consular agency in Bali, Indonesia, along with the current security situation within Indonesia puts US citizens and US interests at risk," said a travel warning issued by the department. A State Department official said two Americans were killed and three were injured in the blasts that have left at least 187 people dead and 309 injured. The vast majority of the casualties were foreign patrons of popular Bali nightspots. The State Department urged Americans who have to travel to or remain in Indonesia to exercise maximum caution and take prudent measure such as avoiding crowds and demonstrations and keeping a low profile. It also said US citizens in Indonesia should avoid political demonstrations that "can quickly turn violent." "American citizens are urged to treat mail and package from unfamiliar sources with suspicion," the warning said.