Mourners attend a funeral ceremony for Iranian Gen. Qassem Soleimani and his comrades, who were killed in Iraq in a U.S. drone strike on Friday, in the city of Kerman, Iran, Tuesday, Jan. 7, 2020. The leader of Iran's Revolutionary Guard threatened on Tuesday to "set ablaze" places supported by the United States over the killing of a top Iranian general in a U.S. airstrike last week, sparking cries from the crowd of supporters of "Death to Israel!" (Erfan Kouchari/Tasnim News Agency via AP)

TEHRAN, Iran (AP) — Iran struck back at the United States for the killing of a top Iranian general early Wednesday, firing a series of surface-to-surface missiles at an Iraqi air base housing U.S. troops and warning the United States and its allies in the region not to retaliate.

U.S. officials confirmed airstrikes at the air base. There was no immediate word on injuries.

Iranian state TV said the attack was in revenge for the killing of Revolutionary Guard Gen. Qassem Soleimani, whose funeral Tuesday in his hometown of Kerman prompted angry calls to avenge his death, which drastically raised tensions in the Middle East.

Iran’s Revolutionary Guard warned the U.S. and its regional allies against retaliating over the missile attack against the Ain Assad air base in Iraq’s western Anbar province. The Guard issued the warning via a statement carried by Iran’s state-run IRNA news agency.

“We are warning all American allies, who gave their bases to its terrorist army, that any territory that is the starting point of aggressive acts against Iran will be targeted,” The Guard said. It also threatened Israel.

“We are aware of the reports of attacks on U.S. facilities in Iraq. The President has been briefed and is monitoring the situation closely and consulting with his national security team,” White House Press Secretary Stephanie Grisham tweeted.