WASHINGTON – President Barack Obama on Wednesday condemned attacks on a U.S. consulate in eastern Libya that killed the U.S. ambassador and three American members of his staff. He ordered increased security at U.S. diplomatic posts around the world.

In a White House statement, Obama said he had ordered "all necessary resources to support the security of our personnel in Libya, and to increase security at our diplomatic posts around the globe."

The attacks occurred Tuesday night in the eastern city of Benghazi by protesters angry over a film that ridiculed Islam's Prophet Muhammad, according to Libya officials. Ambassador Chris Stevens, 52, was killed when he and a group of embassy employees went to the consulate to try to evacuate staff as the building came under attack by a mob guns and rocket propelled grenades. Three other Americans were also killed.