Protesters clash with police in cities across the US over the killing of an unarmed African-American man

Protesters have clashed with police in cities across the US over the killing of an unarmed African-American man at the hands of officers in Minneapolis.

Hundreds of people rallied outside the White House, which was briefly put under lockdown on Friday, demanding justice over the death of George Floyd.

Demonstrations have been taking place in Minnesota, New York and California.

A former Minneapolis police officer has been arrested and charged with murder over Floyd's death in custody.

Derek Chauvin, who is white, was shown in footage kneeling on 46-year-old Floyd's neck.

He and three other officers have since been sacked.