Protest calling for Donald Trump's tax returns turns violent

Thousands of people across the US have marched, calling on President Donald Trump to release his tax returns.

Mr Trump has notably refused to release his tax returns, the first major-party nominee in more than 40 years to do so. He originally said it was because he was under audit before later saying the public didn't care.

But on Saturday (local time), thousands turned out to around 150 cities to prove otherwise.

In Berkley, California, the protests turned violent, with smoke bombs thrown into the midst of the 200-strong crowd.

Police were attending in riot gear and 13 people were arrested. Knives, flagpoles and other weapons were confiscated from protesters.

Several celebrities joined the marches in other cities, while others took to social media to share their support, including The Avengers stars Chris Evans and Mark Ruffalo.

"Looks like it's more than just reporters who wanna see your taxes, @realDonaldTrump. Bad news pal, we're not going away," Evans tweeted.

Responding to a tweet showing the number of protesters who turned out in Washington DC, Ruffalo wrote: "Show us the g-damn tax returns!"

Mr Trump was due to spend the weekend at his Mar-a-Lago resort, and his motorcade dodged protesters on the way from the Trump International Golf Club, according to White House reporters.