The son of Tamil National Alliance (TNA) MP Sivagnanam Shritharan was assaulted in an unprovoked attack by unknown assailants on Friday afternoon.
The parliamentarian's son Shritharan Sarangan was pursued to his home in Jaffna by youths on several motorcycles and assaulted in front of the house.
Sarangan said the attackers fled after realising the home had surveillance cameras, although some of the assailants also damaged his motorcycle.
One person has been arrested in connection with the attack.