Prosecutors also charged a student activist with sedition last week. All five spoke at a political forum earlier this month and criticised the government.
Government critics say the charges are intended to deter rallies aimed at pressuring electoral authorities to investigate claims of irregularities in the May 5 polls. Prime Minister Najib Razak's administration has denied unfairly prosecuting the men, saying they flouted a decades-old law meant to preserve public stability.
