Malaysian Crime Watch Task Force (MyWatch), chairperson R Sri Sanjeevan was among two men detained for criminal intimidation and extortion at the Nilai Toll area, Negri Sembilan yesterday.
Bukit Aman CID chief Mohmad Salleh said the arrests were carried out following a complaint.
"The complainant states that the suspect had threatened to disseminate slander about him on Facebook.
"The suspect was detained with his driver at 10pm last night after receiving RM25,000 in protection money from the complainant," he said in a statement in Kuala Lumpur today.
According to Mohmad, a Toyota Vellfire vehicle, cash amounting to RM41,080 and five cellphones of numerous makes were also seized.
"I urge any quarters who have been threatened by the suspect to come forward to help in investigation," he said.
He said the two suspects were remanded for two days until tomorrow and the case was investigated under Section 506 and 385 of the Penal Code for criminal intimidation and robbery.