Hunter Biden, the son of US President Joe Biden, has pleaded not guilty to three federal firearm charges filed against him after a plea deal collapsed.

He is accused of lying about his drug use in October 2018 on a form to buy a gun, which he kept for around 11 days.

Abbe Lowell, his lawyer, told the court in Wilmington, Delaware, on Tuesday he plans to file a motion to dismiss the case, challenging their constitutionality.

While the president’s son has admitted to struggles with a crack cocaine addiction over the period in question, his lawyers insist he didn’t break the law.

These kind of gun charges are rare, and an appeals court has found banning drug users from guns violates the Second Amendment.

The case remains on track for a possible trial just as the 2024 election looms.

This breaking news story is being updated and more details will be published shortly.

Please refresh the page for the fullest version.

You can receive breaking news alerts on a smartphone or tablet via the Sky News app. You can also follow @SkyNews on X or subscribe to our YouTube channel to keep up with the latest news.