"I demand the immediate arrest and slapping of murder charges against police officials responsible for the fake encounter and killing of 20 Tamils," Vaiko told PTI.
Demanding probe by a sitting Supreme Court judge on the issue, he sought adequate compensation to the families of 20 woodcutters killed in the encounter which he termed as "fake".
He was detained along with over 1,000 party activists before he could proceed by road to Chittoor, 36 km from here in neighbouring Andhra Pradesh.