Few hours after the world celebrated the #AfricaDay2020, it seem it was a racist day in U.

In a video, some white policemen were captured on camera holding an harmless black man in handcuffs to a disturbing choke-hold until he passed out despite onlookers pleading them to let him go as he didn't pose any treat.

In the meantime, the four Minnesota police officers have been fired after the death of a the black man who was taken into custody and seen on video being pinned down by his neck. The black man named George Floyd.

Minneapolis Police Chief Medaria Arradondo said the four officers were now "former employees".

Footage shows the man, George Floyd, groaning and repeatedly saying "I can't breathe" to the white officer.

The incident echoed that of Eric Garner, a black man who died being arrested in New York City in 2014.

The FBI has said it will investigate the Minneapolis incident, which took place on Monday evening.

Minnesota police said Mr Floyd died after a "medical incident" in a "police interaction". They said he had been suspected of committing forgery.

On Tuesday afternoon, Mayor Jacob Frey confirmed the four officers involved in the incident had been "terminated".

"This is the right call," he tweeted.

At a press conference earlier, Mr Frey had described the incident as "completely and utterly messed up".

"I believe what I saw and what I saw is wrong on every level," he said. "Being black in America should not be a death sentence."

It is the latest accusation of US police brutality against African Americans. Recent high-profile cases include an officer in Maryland who fatally shot a man inside a patrol car.

The incident in Minneapolis began after officers located the man in his car, police said in a statement. They were told the man, who has not been identified, was "sitting on top of a blue car and appeared to be under the influence".

After being ordered to step away from the vehicle, the man physically resisted officers, according to police. "Officers were able to get the suspect into handcuffs and noted he appeared to be suffering medical distress," the statement added.

In the 10-minute video filmed by a witness, the man is kept on the ground by the officer and, at one point, says: "Don't kill me."

Witnesses urged the officer to take his knee off the man's neck, noting that he was not moving. One says, "His nose is bleeding", while another pleads, "Get off his neck."

The man then appears motionless before he is put on a stretcher and into an ambulance.

Police said no weapons were used during the incident and that body camera footage had been handed to the Minnesota Bureau of Criminal Apprehension, which is investigating the case.

After the video emerged, police said in a statement: "As additional information has been made available, it has been determined that the Federal Bureau of Investigation will be a part of this investigation."