Jackass star Bam Margera has surrendered to Pennsylvania State Police for allegedly punching his brother during an altercation four days earlier at their home in the Philadelphia suburbs.

Margera was arraigned and pleaded not guilty, according to his lawyer, Michael van der Veen.

“The wild rumours regarding his behaviour this week are absolutely false. He is in good health and in good spirits,” Mr van der Veen said in a written statement.

Court records say Margera was released on 50,000 dollars (£40,000) unsecured bail.

He man not have any contact with his brother, father or two other people who were in the house at the time, according to his bail conditions. He also has to stay away from the house.

State police said they were called to the Chester County home in response to a reported domestic disturbance on Sunday morning.

Margera’s brother Jesse told police that the TV star had pounded on and kicked his locked bedroom door, then punched him in the eye, nose and ear during a confrontation in the kitchen, according to court documents.

Jesse Margera said he had also found a threatening handwritten note signed “Bam”, a police affidavit said.

Margera, who also starred in MTV reality series Viva La Bam, ran from the home through dense woods before officers arrived, the affidavit said.

He was charged with simple assault, harassment and four counts of terroristic threats.

After his arraignment, a post on Margera’s Instagram account said: “Everything went great and the false accusations of what my brother says are not true and he will be sued for defamation as well as being evicted from castle bam sooner than later.”

His next court date is May 25.