The police killing of a wheelchair user who allegedly refused to drop a butcher's knife is under investigation by authorities in California.

The grainy video shows part of the confrontation with Mr Lowe holding a long shiny object and moving on the stumps of his legs away from officers.

In a statement on 30 January, the Huntington Park Police Department said that officers had responded to a stabbing and the victim supplied a description of the suspect.

The victim was left with "a life-threatening stab wound resulting in a collapsed lung and internal bleeding", the police statement said.

Huntington Park Police Lt Hugo Reynaga told the Los Angeles Times that investigators had obtained video of the shooting from a nearby business, but do not plan to release the footage.

A spokesperson for the family told the BBC's US partner, CBS, that Mr Lowe was suffering from a mental health crisis at the time of the shooting.