The son of Amsterdam mayor Femke Halsema will not be prosecuted for the illegal possession of a weapon, the boy’s lawyer has told Dutch media.

The 15-year-old was picked up by police this summer after neighbours reported he and a friend were vandalising an abandoned houseboat. He threw the gun, which later turned out to belong to his father Robert Oey away when he ran off.

He will probably be referred to HALT, a police facility for first offenders, and be sentenced to a period of community service, the lawyer said.

The public prosecution service has not confirmed the measure in connection with the boy’s privacy.

Oey, a film producer who claimed he used the gun as a prop, will be prosecuted for illegally possessing of a weapon. The gun, described as an alarm pistol, had been made safe and could not fire.

The case blew up when the Telegraaf newspaper reported on what it called ‘an armed break-in’ in August, a month after the event took place. Halsema then wrote an open letter defending her son but said that he had broken the law and had to face the consequences.

The matter will be discussed in Thursday’s meeting of the Amsterdam local council.