'He's Not Our President' • Donald Trump's Win Sparks Riots Across US As Angry Crowds Burn American Flag

Crowds of angry protesters have taken to streets across the United States chanting "Not Our President" while setting fires and smashing windows.

Hundreds of people descended on the streets of California minutes after it was announced that Donald Trump had won the election.

Hillary Clinton supporters were filmed setting fire to the US flag while marching through the streets of Portland, Oregon, shouting "Fck Donald Trump".

Video footage also emerged of activists setting tyres and rubbish bins on fire, blocking main roads and lighting flares. People were also burning an effigy of Trump, who will be officially sworn into office in January.