President Obama worked the phones today in the aftermath of two incidents Wednesday, including one that took the life of the U.S. ambassador in Italy and three other Americans.

Obama called Libyan President Mohamed Magariaf, according to a statement released by the White House late tonight, to thank him for his condolences for the death of Ambassador Chris Stevens, Sean Smith and two other State Department officers in Benghazi.

The two "agreed to work closely over the course of the investigation" and Obama "made it clear that we must work together to do whatever is necessary to identify the perpetrators of this attack and bring them to justice."

Obama also called Egyptian President Mohamed Morsi to underscore "the importance of Egypt following through on its commitment to cooperate with the United States in securing U.S. diplomatic facilities and personnel" in the wake of violent anti-American protests outside the U.S. embassy in Cairo. Morsi told Obama "that Egypt would honor its obligation to ensure the safety of American personnel," according to a separate statement released by the White House.