Inspector-general of police Khalid Abu Bakar has warned Malaysians not to question Islam and hudud as it may provoke a retaliation from the terror network Islamic State (IS).

"I would like to remind (the public) who make comments on Islam and hudud not to simply comment, (because) you are inviting retaliation from IS supporters," he told reporters.

He said Malaysia is facing a threat from the radical Islamist group, and intelligence reports reveal that they are planning an attack here.

"Of course... We are facing an imminent threat from the IS... We are worried, and the threat is imminent," he said when asked about police intelligence on this matter.

Khalid also did not rule out an incident similar to the Paris terror attacks happening here due to comments on hudud.

"Why not? Which is why we do not want the public to discuss this matter publicly," he told reporters at a press conference in Kuala Lumpur.

He said the attacks may be carried out by locals who have been "poisoned or brainwashed" by IS, or by foreign militants who manage to slip through police detection.

He assured that police have deployed a major force to monitor IS militants and their activities.

The country's top cop however dodged a question on Tourism and Culture Minister Nazri Abdul Aziz's comment yesterday that it was foolish to discuss the implementation of hudud in Malaysia.

"I don't want to comment on that. I am saying what I need to, to remind the public about public security, if they want to listen they will listen," he said.