Approximately seven mortar rounds landed in the U.S. Embassy compound in Baghdad during an attack early on Friday, a U.S. military official told Reuters, in what appears to be one of the largest attacks against the embassy in recent memory.

It also marked the first time the U.S. embassy had been fired on in more than a year, apparently widening the range of targets after dozens of attacks on military bases housing U.S. forces in Iraq and Syria since mid-October amid fears of broadening conflict in the region.

No group claimed responsibility, but previous attack against U.S. forces have been carried out by Iran-aligned militias which have targeted U.S. interests in Syria and Iraq over Washington’s backing for Israel in its Gaza war.