Citizen Action Group on Enforced Disappearance (Caged) today vowed to hold a candlelight vigil every last Saturday of the month.

This is to keep the issue of the disappearance of pastor Raymond Koh and three others alive, Caged’s chief spokesperson Thomas Fann said.

"We will continue to highlight these disappearances and we have promised, on every last Saturday of the month, we will be holding the vigil at Dataran Merdeka," Fann told reporters outside Bukit Aman today, after he and two other activists were summoned by the police for questioning.

The next candlelight vigil will be held this Saturday, at 8.30pm at Dataran Merdeka, he said.

Fann (photo), Suaram's Sevan Doraisamy and Bersih's Rama Ramanathan, who are all part of Caged, were called in to Bukit Aman today to give their witness statements.

They were questioned about their press conference on May 5, at which they had launched Caged, Fann said.

One of the questions asked, he added, was whether they had any foreign instructions to form Caged.

One of their lawyers, Ramkarpal Singh, said the case is being investigated under Section 505(b) of the Penal Code for statements conducing to public mischief.

The three activists exercised their right not to answer the questions from the police, Fann said, adding that they would answer the questions in court, if they are charged.

Pastor Raymond Koh was abducted in February while Amri Che Mat, along with Joshua and Ruth Hilmy, disappeared last November.

On the May 5 press conference, Caged had claimed that these disappearances were "enforced disappearances".

Enforced disappearance is defined by the UN Convention for the Protection of All Persons from Enforced Disappearance as "the arrest, detention, abduction or any other form of deprivation of liberty by agents of the state or by persons or groups or persons acting with the authorisation, support or acquiescence of the state..."