At least four migrants have drowned in the Channel overnight off Boulogne sur Mer on France’s northern coast while trying to cross to Britain, French maritime police have said. A navy patrol boat went to the site after being alerted that several migrants had fallen into the sea while trying to cross the Channel, maritime police said. Sixty-three people were rescued by the French coast guard. French navy patrol boat spotted the overcrowded vessel early Friday as it deflated off the French coast, the statement said.