Hong Kong police have arrested an elderly man and his son for allegedly assaulting public officers after they threw a parking ticket at two traffic wardens in Tuen Mun, the South China Morning Post has learned.

A source said on Sunday that police arrested the 61-year-old man and his 31-year-old son outside cooked food stalls in Sam Shing at 11.40am.

Earlier, at around 11.30am, a traffic warden had issued a parking ticket when the two men returned and disputed the penalty.

During the confrontation, the older man allegedly threw the ticket at a female warden, aiming at her forehead and chest.

A male traffic warden then approached to assist his colleague, but the younger man reportedly picked up the ticket and threw it at him twice.

Police officers at the scene arrested both men.