A dramatic video has emerged from the US of the moment a chimpanzee was beaten to death by seven other primates, after falling 40 feet from a tree while fighting.

The footage, filmed on June 21 at Kansas City Zoo, MO, shows the ferocious gang of chimps surrounding the stricken animal and beating him with their hands and branches.

''As I got close I could already hear the chimps ''yelling at each other." When I entered the viewing area I saw a long group of five or six chased up into a tree,'' the filmer later wrote online.

''This group began fighting in that first tree and from about 40 feet up one chimp fell to the ground.''

''He got up as the others were descending the tree and the whole group chased up into a second tree,'' he continued.

''In that second tree the four or five caused the one to fall again, this time landing on a stone slab about 30 feet beneath the tree.

''Once the chimp fell again he tried to hobble away. The others then encircled him and began beating on him.''

''Once the zoo staff arrived they were finally able to get them apart (by enticing with food stuffs from afar) and they got the injured chimp to safety. He died only a short time later,'' he added.

Taken June 21, 2017 at 0904 AM, CST.

One Chimpanzee named Bahati was killed by several other chimps by being beaten to death. The fight began in the trees and after Bahati fell 30 or 40 feet, the other chimps surrounded it and began beating it. Bahati later died of its injuries.

I go to the zoo often as it is a place of quiet and peace for me. That Wednesday morning I arrived just after opening (8:00) and took my time walking to the very back of the zoo where the chimps are at. As I got close I could already hear that they were "yelling at each other." When I entered the viewing area I see them coming into view and before long group of five or six chased up into a tree.

This group began fighting in that first tree and from about 40 feet up one chimp fell to the ground. He got up as the others were descending the tree and the whole group chased up into a second tree.

In that second tree the four or five (I have a second video that shows them fighting in that second tree) caused the one to fall again, this time landing on a stone slab about 30 feet beneath the tree.