The most Iraqít a UAV mounted explosives fell close to Ain Al-Asad base, where the troops of the US and allied forces, but did not cause casualties.

An unmanned aircraft (UAV) mounted explosives to the military base with American soldiers stationed at Iraq's Baghdad International Airport on June 21, but it is unclear if there is causing damage to people and infrastructure

The Iraqi Defense Ministry and the US military did not comment on this information.

The US military position at the Erbil Base, Northern Iraq, on June 6.

Some sources said the Iranian militia may be switching to using a small UAV for US base-based hits in Iraq, because they have a higher accuracy and difficulty being detected by air conditioning systems.

Iraqi militants often use cheap jets and unmanned aircraft (UAV) to exercise military facilities with American soldiers stationed, as well as the US Embassy in Baghdad.

Regular attacks hindered the operation of US defense and defense contractors working at the bases in Iraq.

The United States brought the troops into Iraq in 2003 to overthrow President Saddam Hussein, then completely withdrew force from Iraq in December 2011 at the order of President Barack Obama, but was deployed again since 2014 to prevent rebels

Although IS was defeated, the US still maintained thousands of soldiers stationed in Iraq to train and support the military to prevent rebels.