A French chef, arrested Tuesday for setting fire to a Tokyo apartment complex where he lives, has told investigators that he committed the crime to vent his work stress, police said. "I was exhausted from work, I set fire to my apartment to release my stress," Christophe Colin, 33, owner of Chez Christophe restaurant in the Ebisu district of Shibuya-ku, was quoted as telling investigators. Tokyo police are grilling Colin over his alleged involvement in three suspected arson cases that occurred in his neighborhood between February and May this year. In one of the three cases, an apartment block was burned down. Colin used a cigarette lighter to set fire to artificial turf at the entrance of his apartment complex in Shinjuku-ku, Tokyo, in the predawn hours of June 21, investigators said. The fire did not spread throughout the structure.