The police are not shaken by an Islamic State threat to wreak havoc on Bukit Aman, said inspector-general of police Khalid Abu Bakar.

"Don't try to threaten us. We take this seriously but we (the police force) are too old to be (frightened) by this kind of threats.

"You only dare to make threats from afar, (why don't you) come back!" Khalid said at a press conference in Ampang today.