A rocket attack on a military base in Iraq left several U.S. personnel injured on Monday, U.S. officials said.

The attack comes as tensions across the Middle East are spiking following the killings last week of a senior Hezbollah commander in Lebanon and Hamas’ top political leader in Iran.

The U.S. defense officials said troops at al-Asad air base were still assessing the damage. Earlier Monday, Iraqi security officials confirmed the attack, but no group has claimed responsibility.

The officials spoke on condition of anonymity to discuss military operations.

In recent weeks, Iranian-backed Iraqi militias have resumed launching attacks on bases housing U.S. forces in Iraq and Syria after a lull of several months.

Last week the U.S. carried out a strike in Iraq against individuals U.S. officials said were militants getting ready to launch drones and posed a threat to U.S. and coalition forces.

The U.S. is bracing for Iran to make good on its vow to respond to the assassination of Hamas leader Ismail Haniyeh two days ago in Tehran.

The Pentagon has said it will deploy additional fighter jets and Navy warships to the Middle East, as Washington seeks to bolster defenses following threats from Iran and its allies Hamas and Hezbollah.

Last week the U.S. carried out a strike in Iraq against individuals U.S. officials said were militants getting ready to launch drones and posed a threat to U.S. and coalition forces.

The U.S. is bracing for Iran to make good on its vow to respond to the killing of Hamas leader Ismail Haniyeh two days ago in Tehran - one in a series of killings of senior figures in the Palestinian militant group as the war between Israel and Hamas in Gaza rages.

The Pentagon has said it will deploy additional fighter jets and Navy warships to the Middle East, as Washington seeks to bolster defenses following threats from Iran and its allies Hamas and Hezbollah.