KABUL (AP) — President Hamid Karzai said Thursday he will meet President Barack Obama in Washington next month to discuss a postwar U.S. role in his country, whose fragile security was highlighted hours earlier by a suicide bombing that killed one U.S. troop and two Afghan civilians.

At a news conference with visiting Defense Secretary Leon Panetta, Karzai said he and Obama will discuss how many U.S. troops will remain after the Western combat mission ends in December 2014. He said he understands that immunity from Afghan laws for those remaining Americans is of “immense importance” to Washington, but he added that he has his own priorities in negotiating a postwar U.S. role.