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US police have shot and killed a homeless man during an altercation in central Los Angeles, in an incident caught on video.
Police say that three officers opened fire after the man tried to grab a gun from an officer.

The graphic film shows a violent struggle between the man and several officers in the city's Skid Row area.
The dead man was known as Africa and had been homeless after treatment for mental illness.

The LA police department said officers had been responding to reports of a robbery and had attempted to use a Taser to subdue the suspect but he had "continued fighting and resisting".