A blaze and several explosions rocked the set of the latest James Bond movie "Casino Royale" outside London on Sunday, fire officials said. The cause of the fire was unknown, but several cylinders of flammable gas exploded, authorities said. Three unidentified people, who were at the set, were not hurt. The fire broke out just before 11:30 a.m. (1030GMT) at Pinewood Studios, about 30 kilometers (20 miles) west of London, Buckinghamshire Fire and Rescue Service said. Eight fire engines were called to the scene of the 007 set, officials said.