A regional leader in Russia\'s restless North Caucasus on Tuesday accused a feared Islamist who has claimed some of Moscow\'s deadliest bombings of organizing a suicide strike that killed seven police. \"It is clear that the organizer of this terrorist attack is Doku Umarov,\" the state RIA Novosti news agency quoted Ingush President Yunus-Bek Yevkurov as saying. A suicide bomber, identified by the authorities by his last name Aldiyev on Sunday, killed seven policemen as they arrived at a colleague\'s funeral over the weekend. Fifteen people were injured in the blast. Umarov, reported dead by the authorities on repeated occasions and viewed as the country\'s enemy number one, heads a militant movement that for years has been trying to impose an Islamist state throughout the mainly Muslim Caucasus. His Caucasus Emirate group has claimed atrocities including a deadly Moscow airport bombing in 2011 and a metro attack in the capital in 2010. Yevkurov also said that besides the suicide bomber and Umarov, the authorities had also identified the immediate organizer of the attack.