KUALA LUMPUR (THE STAR/ASIA NEWS NETWORK) - Two university students have been detained for allegedly posting a video threatening to "blow up" a courthouse.

Inspector-General of Police Khalid Abu Bakar said the students - from Universiti Selangor (Unisel) and Universiti Sains Malaysia (USM) - were detained on Tuesday.

"We have detained the two in connection with the video," he tweeted on Wednesday.

The IGP said police would hunt for the remaining culprits.

On Monday, in an ISIS-style terror threat, four masked men issued a warning that they would blow up a courthouse in Malaysia on Wednesday to symbolise their mistrust in the judicial system.

This threat came a week after opposition leader Anwar Ibrahim was found guilty for sodomising his former aide and sentenced to five years in jail by the Federal Court.

In the one-minute long video that was uploaded to one "ISIS Malaysia 69" Youtube account on Sunday, one of the four men declared that their action signalled the beginning of their protest on the breakdown of democracy.

One man was seen brandishing Molotov cocktails while a row of the patrol bombs were placed on the table. A Malaysian flag was hung in the background.

"To the parties who have been in power for so long, we, the youth of 2015 would like to announce that we no longer trust the democracy,'' one of the men said, while holding a picture of popular actress Nora Danish.

"We are the product of the flawed system... Therefore, we will perform an act of protest against the judiciary on Feb 18, 2015 at 11.30pm by igniting fireworks, as a symbol of the complete demolishing of trust in the judicial system.

"This is just the beginning and we will take even bigger steps," he said.

He did not state which courthouse would be their target.

The men ended their warning with a profanity-laced rant against democracy.