Police have arrested four PSM members including party secretary-general A Sivarajan for holding a candlelight vigil outside the Johor Baru Utara police district headquarters last night.

PSM's M Nalini told Malaysiakini this evening that the four were arrested outside the police headquarters at 7.45pm, just about 15 minutes after police released detained PSM central committee member Khairul Nizam Abd Ghani.