Britain, Australia and Canada joined the United States on Saturday in warning their citizens of a security threat in the Philippines, particularly in the capital, Manila.
Philippine authorities say they have no information of a specific threat against Westerners but are treating the warnings seriously.
On Friday, the U.S. Embassy in Manila said "reliable security forces" detected a threat specifically in suburban Pasay City where it maintains a residential facility and a Veterans Affairs office.
It urged U.S. citizens to avoid gatherings that may be regarded as "American events." The threat remains through Oct. 10, it added.
Australians were advised to "exercise a high degree of caution in the Philippines because of the high threat of terrorist attack and the high level of serious crime."
Britons were told that terrorist attacks "could be indiscriminate" and targets could include places frequented by foreigners such as airports and shopping malls.
Canadians were warned of "an ongoing terrorist threat to Westerners and Western interests in the Philippines" and bombings that "could occur at any time in Manila and other key cities."
Metropolitan Manila police chief Leonardo Espina said Saturday that he had ordered beefed up security for embassies with increased patrols by uniformed and plainclothes officers.
Such measures were taken after attacks that killed the U.S. ambassador in Libya following Muslim protests against an anti-Islam film.
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