evidence: Uganda and Congo also have a dispute over the ownership of Rukwanzi Island, a "floating island" in Lake Albert. The recent discovery of oil under Lake Albert exacerbated the territorial dispute over the ownership of the island. The 12 square kilometre area is home to about 3,000 people, mostly fishermen. Troops from Uganda and the DR Congo exchanged gunfire near Rukwanzi Island in August 2007, leaving several people dead, including a British contractor who worked for an oil company.