March 27 (UPI) — An Iranian attack on an air base in Saudi Arabia on Friday injured 10 U.S. service members — two seriously — unnamed officials familiar with the incident told media outlets.

The attack took place at the Saudi military’s Prince Sultan Air Base in Al Kharj, striking a building where the U.S. service members were, U.S. officials told The Wall Street Journal. NBC News and CBS News also confirmed the attack, citing unnamed sources.

Iran used missiles and drones to carry out the attack, which also damaged multiple refueling vehicles.

Since the start of the war in Iran a month ago, more than 300 Americans have been injured and 13 killed.

The United States and Israel began attacks on Iran beginning Feb. 28 amid stalling talks regarding Iran’s nuclear program. On Thursday, President Donald Trump said the United States would forgo attacks on Iran’s energy sites for 10 days to give time for further negotiations to end the war.

Iran on Friday blamed Israeli for contradicting Trump’s 10-day delay by launching attacks on infrastructure sites, including an energy plant.

The U.S. Air Force’s 378th Air Expeditionary Wing has been based at Prince Sultan base since 2019.