Donald Trump has pleaded not guilty to election interference charges in the US state of Georgia, a court filing showed, as the former United States president waived a formal arraignment hearing.

Thursday’s court filing, which was signed by Trump, reads: “As evidenced by my signature below, I do hereby waive formal arraignment and enter my plea of NOT GUILTY to the indictment in this case.”

The former president faces 13 criminal charges in Georgia, where prosecutors have accused him and 18 associates of joining a conspiracy to “unlawfully change the outcome” of the 2020 US presidential election in the state.

Prosecutors had set arraignment hearings for Trump and his co-defendants for September 6.

Trump, who remains the frontrunner in the Republican Party’s 2024 presidential nomination race, surrendered last week at the Fulton County Jail in Atlanta to face the charges.

He was swiftly released on $200,000 bond after becoming the first former president in US history to have his mugshot taken during his brief arrest.

The Georgia case is the second indictment accusing Trump of election interference and the fourth set of criminal charges against him so far this year.

He has denied any wrongdoing in all the cases, saying they are an attempt to derail his re-election bid.

This is a developing story. More updates to follow.