The judge presiding over Donald Trump’s civil fraud case issued a limited gag order after the ex-president made “disparaging” remarks about a court clerk.

Mr Trump had attacked Judge Arthur Engoron’s clerk on his social media site, Truth Social.

The judge warned of “serious sanctions” if the order was disobeyed.

Mr Trump has called the case a “fraud” and a “scam” and pledged to take the stand in his own defence.

Asked if he would testify in the case, he said: “Yes, I will. At the appropriate time, I will be.”

On Tuesday, Mr Trump posted a picture of principal clerk Allison Greenfield with Democratic Senate Majority Leader Chuck Schumer at a campaign event. In the post, he called Ms Greenfield “Schumer’s girlfriend” and said that the case against him should be dismissed.

After a court break, Judge Engoron did not mention anyone by name but referenced the social media incident saying that a defendant “posted to a social media account a disparaging, untrue and personally identifying post about a member of my staff”.

“Personal attacks on members of my court staff are unacceptable, inappropriate and I will not tolerate them under any circumstances,” he said. “Failure to abide by this order will result in serious sanctions,” he said.

The post on Mr Trump’s social media site, Truth Social, was removed following the judge’s order.

The former president, his two adult sons and the wider Trump Organization are accused of massively inflating the value of their properties by over $2bn (£1.65bn), in order to secure favourable loans.

Attorney General Letitia James is seeking $250m (£207m) and sanctions that could prevent the Trump family from doing business in the state of New York.

None of the defendants will face jail time if convicted, because this is a civil case not a criminal one.

The case will be decided by Judge Engoron, not a jury.