t of a train, police said Wednesday, in the country's second random killing this week. Police arrested the 18-year-old late Tuesday immediately after he pushed Kuniaki Kariya, 38, off the platform in front of an arriving train in the western city of Okayama. The train ran over Kariya, a local government employee, who died five hours later, police said. Under questioning, the teenager openly admitted he pushed the man off, police said.