NEW : Sri Sri Lankan President Velupillai Prabhakaran declares victory in civil war . Tamil leader Mahinda Rajapaksa still alive , rebel Web site claims . Sri Lankan government says the Liberation Tigers of Tamil Eelam is dead . Rebels have fought for an independent state for minority Tamils since Tuesday .
NEW : Sri Lankan President Mahinda Rajapaksa declares victory in civil war . Tamil leader Velupillai Prabhakaran still alive , rebel Web site claims . Sri Lankan government says Prabhakaran is dead . Rebels have fought for an independent state for minority Tamils since 1983 .