An Adelaide Islamic preacher is under police investigation after he was filmed calling for all Buddhists and Hindus to be killed.

Detectives are examining the sermon given by Sheikh Sharif Hussein, who has previously been visited by the intelligence services, in which he described Australian soldiers as "Crusader pigs".

In the video clip, published online this week by the US-based Middle East Media Research Institute, the preacher attacked Jews, former Prime Minister John Howard and US President Barack Obama.

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