Four masked individuals appeared at the home of TNPF leader Gajen Ponnambalan, making enquiries as to his wherabouts.
On being told that he was out, the four individuals, who were covered by helmets and raincoats, proceeded to take photographs of the motorbikes of TNPF members parked outside Ponnambalan's house.
The incident, a suspected attempt at intimidation, occured while Mr Ponnambalam attended a May Day Event in Vadamarachi hosted by the TNPF and the All Ceylon Tamil Congress.