The family had initially offered a reward of RM10,000.

“Our family is grateful and touched that concerned well-wishers have stepped up to increase the reward money offered,” Koh’s 61-year-old wife, Susanna Liew, told The Star Online.

The family is hoping the increased reward would encourage people with any information on the abduction to come forward. Koh was abducted on Feb 13.

The Star also quoted a statement by Koh’s son Jonathan that the money would be “divided according to the accuracy and usefulness of information provided”.

He added that the identity of the informants would be kept private if requested.

Those with information can contact Jonathan at 011-3973 2670.

Koh was abducted by a group of masked men on Jalan SS4b/10, Petaling Jaya, less than 100m from the Police Housing Complex. He was driving a silver Honda Accord bearing the licence plates ST 5515 D.

Koh was at the centre of a controversy in 2011 after his NGO, Harapan Komuniti, was accused of proselytising Muslims by the Selangor Islamic Religious Department (Jais), following a raid at a thanksgiving and fundraising dinner at the Damansara Utama Methodist Church.