Three Katyusha-type rockets struck a military complex near Baghdad's international airport that is used by US troops and diplomats early Wednesday (May 6th), Iraq's military said, without reporting casualties.

The attack was the first time US installations in Iraq have been targeted since late March, after around six months of rocket attacks that killed US, UK and Iraqi troops.

It also comes hours before Iraq's parliament is set to vote on a long-awaited new government, five months after the current cabinet resigned.

Iraq's security forces said in a statement that the rockets hit near the airport around dawn and that military units found the launching pad in an area west of Baghdad.

"The target was the headquarters of the Counter-Terrorism Service, where US troops are based," a security source said.

The high-security complex also hosts US diplomats moving in and out of the country.

Incident follows lull in tensions

Baghdad's airport has been closed since mid-March as part of a nationwide lockdown to contain the novel coronavirus (COVID-19) pandemic.

It has coincided with a relative lull in tensions between the US and Iran after a particularly tense few months.

In January, the US carried out a drone strike that killed top Iranian general Qassem Soleimani and Popular Mobilisation Forces deputy Abu Mahdi al-Muhandis at the Baghdad airport.

It then began planning for a widespread bombing campaign against pro-Iran groups in Iraq that it blamed for the rocket attacks on its forces.

Iran, in turn, launched missiles at US troops stationed in west Iraq and has vowed to oust all US forces from the Middle East.

The tit-for-tat attacks brought the two countries to the brink of war in Iraq, but since late March there had been no rocket launches and little escalatory rhetoric.

The international coalition helping Iraq fight remnants of the "Islamic State of Iraq and Syria" (ISIS) also has pulled back from nearly a half-dozen bases and relocated hundreds of troops.

But analysts say the two sides are likely repositioning for a conflict that could flare up at any moment.