WASHINGTON (AP) — Three Republican senators are asking President Barack Obama whether he spoke to any Libyan government official during the deadly assault on the U.S. diplomatic mission in Benghazi, Libya, last September.

In a letter Tuesday, John McCain, Kelly Ayotte and Lindsey Graham pressed Obama on whether he sought help for U.S. personnel who were under attack. Ambassador Chris Stevens and three other Americans died in the Sept. 11 raid.