Four police officers fired after killing of unarmed black man in Minnesota

Four police offers in US city of Minneapolis have been fired for their involvement in the death of George Floyd, an unarmed black man who was held down with a knee as he complained of not being able to breathe and said, 'don't kill me."

Footage of the horrific incident has been widely shared on social media.

The FBI is now investigating the incident, which has led to mass demonstrations as citizens of the city in Minnesota demand justice.

Many of the protester's held placards that read, "I can't breathe".

Police used tear gas to disperse crowds after protesters threw rocks at police cars.

The four officers involved in Floyd's death have since been fired.

The mayor of Minneapolis Jacob Frey tweeted: "Four responding MPD officers involved in the death of George Floyd have been terminated. This is the right call."

Frey also said one of the officers involved "failed in the most basic, human sense".

Floyd's death is a reminder of the death of Eric Garner.

Who died after being choked by a police officer in New York in 2014, his death became a rallying call against police brutality while it was also one of the incidents that led to the Black Lives Matter movement.

The distressing video shows George Floyd being held down by a police officer's knee as he pleads, "please, I can't breathe" and "don't kill me", as bystanders beg officers to let him go.

He then ceases to move before an ambulance takes him to hospital, where he later died.

Mayor Frey said: "Being black in America should not be a death sentence. For five minutes we watched as a white police officer pressed his knee into the neck of a black man. For five minutes. When you hear someone calling for help, you are supposed to help."

The FBI will present its findings to the Minnesota state's attorney for possible federal charges.