An armed unmanned aerial vehicle has reportedly hit the Victory Base hosting US troops at Baghdad International Airport, but the extent of the damage is unclear.

Yemeni armed forces and their allies have carried out fresh retaliatory attacks against Saudi Arabia, including one on a facility run by oil company Aramco.

Saudi Arabia’s Energy Ministry says a drone has struck an oil facility in the capital of Riyadh, igniting a fire at the installation.

The spokesman for the Yemeni Armed Forces says army troops and their allies have carried out a retaliatory drone strike against Saudi Arabia’s Abha International Airport.

Armed drones have targeted the US-run Ain al-Asad Air Base in Iraq’s western province of Anbar.

A Pentagon investigation claims that the US drone strike that killed 10 civilians, including seven children, in Afghanistan’s capital city of Kabul in late August did not violate any laws, including the laws of war, and was not caused by misconduct or negligence.

Fox News reports that the US military had evacuated some 200 troops from al-Tanf base in southern Syria prior to last week's attack on the military facility.