<p>A SUSPECTED arson attack at an animation production company in Japan killed 33 people and injured dozens more today, after a man reportedly doused the building with flammable liquid and shouted “drop dead.”</p> <p>A motive for the apparent attack remained unclear hours after the blaze. If arson is confirmed, the attack will be among the deadliest criminal acts in decades in Japan, where violent crime is extremely rare.</p>