US AIR strikes across the Middle East have killed thousands of civilians without accountability in a string of deadly failures, according to newly leaked Pentagon papers.

A special report, published in the New York Times on Saturday, revealed that 50,000 missile attacks in Afghanistan, Iraq and Syria  have caused 1,300 casualties over a five-year period.

The newspaper said that its probe, in which reporters visited more than 100 sites, interviewing survivors and military officials, showed the number of civilian deaths had been “drastically undercounted.”

US aerial campaigns have been conducted with “deeply flawed intelligence and claimed the lives of thousands of civilians, including many children, without accountability,” the report stated.

One of the cases investigated by journalists was the July 2019 bombing of alleged Isis strongholds in northern Syria in which the military claimed 85 militants died.

Instead 120 farmers and civilians were killed during the air strikes, the Pentagon documents concluded.

In another incident in November 2015 a man dragging “an unknown heavy object” was killed in the Iraqi city of Ramadi.

A review found that the object was in fact a child who was also killed in the air strike.

Despite the killing of thousands of innocent civilians, no action has been taken by the US military.

“Not a single record provided includes a finding of wrongdoing or disciplinary action,” the report said.

US Central Command spokesman Captain Bill Urban brushed off the civilian casualties, saying that “even with the best technology in the world, mistakes do happen … And we try to learn from those mistakes.”

The latest revelations come just a week after the Pentagon announced that nobody would be punished for a drone strike that killed 10 civilians, including seven children, in the Afghan capital Kabul in August.

Defence Secretary Lloyd Austin refused to call for additional accountability measures following a review of the incident.