British Prime Minister David Cameron is slated to discuss threats posed by the Islamic State (IS) during his South East Asia visit, a media report said on Sunday.Cameron will begin his four-day visit to Indonesia and Malaysia on Sunday, BBC reported.Speaking ahead of his departure, Cameron said the IS was "one of the biggest threats our world has faced."All of us face a threat from foreign fighters and from increasing radicalisation within our countries, and it is right that we look at what help we can provide to one another," he said.The British government estimates at least 500 people from Indonesia and at least 200 from Malaysia have joined the IS in Iraq and Syria.Cameron is expected to hold meetings with Indonesian President Joko Widodo and Malaysian Prime Minister Najib Razak.