The United States and Israel hit Iran with deadly attacks for a second day. Three American service members were killed in action, the Pentagon said, and at least nine people were killed in a small Israeli city near Jerusalem. People filled the streets of the capital on Sunday to mourn the killing of Iran’s supreme leader and other top officials in U.S.-Israeli attacks.  Aaron Boxerman Farnaz Fassihi Helene Cooper Zolan Kanno-Youngs and Tyler Pager A day after a joint U.S.-Israeli military operation unleashed a bombing wave across Iran and killed Iran’s supreme leader, the attacks intensified on Sunday by land and sea. Iran launched retaliatory strikes against Israel and several Persian Gulf countries, and the United States reported its first casualties of the conflict. Amid fears of a wider conflagration with no clear endgame, President Trump said that Iran’s new leadership wanted to speak to him and that he was willing to do so. “They should have done it sooner,” Mr. Trump told The Atlantic magazine from his residence in Florida. The Iranian government did not publicly respond to his remarks. The White House spokeswoman, Karoline Leavitt, said that Mr. Trump spoke on Sunday with the leaders of Bahrain, Israel and the United Arab Emirates. Those consultations took place as Iran, and the regional balance of power, were shaken by the killing of the nation’s longtime leader, Ayatollah Ali Khamenei, in an Israeli missile strike based on U.S. intelligence. President Trump called afterward for the Iranian people to “take control.” Three U.S. troops were killed in action at a base in Kuwait, the Pentagon said on Sunday, the first Americans to die in the war with Iran. At least nine people were killed in Israel, and at least four people were killed in attacks across the United Arab Emirates, Kuwait, Qatar, Bahrain and Oman, according to official reports tallied by The New York Times. The Israeli military said on Sunday that its air force was again bombarding “the heart of Tehran,” the Iranian capital. The military said it had struck Iranian missile launchers, air defense systems, command centers and headquarters of the government, and missile launchers.