Security was increased at U.S. embassies and consulates around the world following an attack that killed the U.S. ambassador in Libya.
Guards and police special forces were seen carrying assault rifles outside the U.S. Embassy in the Philippine capital.
Barack Obama ordered increased security at American missions around the world after the killings and angry protests outside the U.S. Embassy in Cairo.
"President Obama yesterday directed an increase in security at diplomatic posts around the world, and this includes our embassy here in Manila," said embassy spokeswoman Tina Malone.
Americans flags were lowered at half-staff as U.S. Ambassador Harry K. Thomas Jr. mourned the loss of the American diplomats in Libya.