Footage shows Mother of All Bombs' devastating power

This was the moment US forces dropped the MOAB - the 'Mother of All Bombs' - on an Islamic State (IS) target in Afghanistan.

Footage released by the US shows the bomb's devastating power. Witnesses described the aftermath of the weapon, with smoke filling the air and the whole area burning.

Afghan officials claim 36 IS fighters were killed in the explosion. But not all of the US' allies agreed with the use of the MOAB.

Former Afghan President Hamid Karzai tweeted: "This is not the war on terror, but the inhuman and most brutal misuse of our country as testing ground for new and dangerous weapons."

Pentagon spokesman Adam Stump said the warhead targeted a network of caves believed to be used by IS fighters in the Achin district of Nangarhar, close to the border with Pakistan.

The bomb is about six metres long and races to the ground at supersonic speed.

It can penetrate rock, concrete and steel plates while bursting three metres above the ground, and can kill people within several hundred metres of the point of detonation.

US military officials claim the bomb would feel like a nuclear blast to anyone in the area.

They claim the psychological effect on survivors or observers is considered an added impact of the weapon.