Russia\'s top Islamist leader Doku Umarov called in a video released on Wednesday for jihadists to stage attacks against a range of targets that include the 2014 Sochi Olympic Games. \"We know that on the bones of our ancestors, on the bones of many, many Muslims who died and are buried on our territory along the Black Sea, today they plan to stage the Olympic Games. We, as the Mujahedeen, must not allow this to happen by any means possible,\" Umarov said in a message posted on the kavkazcenter.com website.