What started the fire at the Coconut Grove night club in Boston?

The fire that killed 491 people at the Boston night club The Coconut Grove on November 28, 1942, may have been started by a 16-year-old boy named Stanley Tomaszewski who lit a match near a palm tree while trying to replace a light bulb.

However, the fire commissioner could not prove that the boy had started it, and the blaze was officially declared “of unknown origin.”