Since the beginning of August, four civil servants have been arrested for sedition, including two men rounded up by the national security police on Tuesday.
The police said the pair, aged 28 and 29, were administrators of a social media page that allegedly disseminated seditious messages promoting feelings of hostility between different classes of the population.
A police source told AFP that the pair managed a Facebook page called Civil Servants Secrets, which publishes anonymous posts by government workers.
As of Tuesday evening, the page had been taken down.
Police said five other men were also investigated in relation to the case and two of them – who were paramedics, according to local media – were arrested for suspected fraud.
The Fire Services Department confirmed that five of their staff members were under police investigation.
Last week, an Inland Revenue Department officer was brought to court over a sedition charge and denied bail.