AlQa'dah 16, 1433, Oct 2, 2012, SPA - Investigators on Tuesday boarded a half-submerged boat that collided with a ferry a night earlier, killing at least 36 people who had been on their way to a holiday fireworks show. It was Hong Kong's worst accident in well over a decade, AP reported. There was no immediate word about how Monday night's collision occurred on the tightly regulated waterways of one of Asia's safest places. The evening was clear and both vessels should have been illuminated by running lights when they crashed near Lamma island off the southwestern coast of Hong Kong island. The ferry collided with a boat owned by utility company Power Assets Holdings Ltd., which was taking its workers and their families to famed Victoria Harbor to watch a fireworks display in celebration of China's National Day and mid-autumn festival.