Canada's top security official said that the navy has boarded a cargo ship carrying 490 asylum seekers, including some people Canada has said may be terrorists. Public Safety Minister Vic Toews said Thursday the vessel has declared them to be refugees. But he says the government has concerns that there may be members of the Liberation Tigers of Tamil Eelam, or Tamil Tigers, on board. Canada has labeled the Tamil Tigers as a terrorist group since 2006, according to AP. The ship is currently off the coast of Vancouver Island and is travelling at a slow rate of speed through fog. The Tigers fought a civil war for a quarter of a century in Sri Lanka seeking a state independent of the ruling Sinhalese majority. The Sri Lankan conflict ended in May 2009 after a massive government operation against the Tigers.