New charges have been announced against all of the sacked police officers in connection with the death of George Floyd in Minneapolis.

The charge against Derek Chauvin - the white police officer seen kneeling on Floyd’s neck during his arrest -  has been elevated to second-degree murder, court documents show.

The other three officers present at the scene, who were previously not charged, now face counts of aiding and abetting murder.

Announcing the new charges, Minnesota's Attorney General Keith Ellison said that they were in the interests of justice.

Chauvin had initially faced charges of third-degree murder and second-degree manslaughter. These will stay on his charge sheet.

The other three sacked officers, Thomas Lane, J Alexander Kueng and Tou Thao all face charges of aiding and abetting second-degree murder, and aiding and abetting second-degree manslaughter.