Five people died and one was missing early Monday after a whale-watching boat sank off the coast of British Columbia in Canada, authorities told NBC News.
The U.K.'s Foreign and Commonwealth Office confirmed that all five were British nationals.
The 64-foot Leviathan II had 27 people on board when it sank northwest of Tofino, a small community on Vancouver Island in British Columbia, officials said. Of those on board, five were found dead, 21 were rescued, while another person was listed as missing on Sunday, NBC News reported.
The reason why the boat sank was not immediately clear, according to The Associated Press.
Editor's Note: An earlier version of this story used an image of a boat not related to this sinking.