[explosion from Wakayama, Japan: suspect throws silver cylindrical objects] Xinhua News Agency, April 15, an explosion was heard at a speech venue in the city of Wakayama in western Japan. The latest footage exposed by Japan's Yomiuri Shimbun shows that after the incident, the objects thrown by the man were still on the ground at the scene. The report said that the object thrown by the man involved was a cylindrical object with a silver appearance. The Japan Broadcasting Association (NHK) said earlier that the object thrown by the man was suspected to be a "smoke bomb" and there was a lot of white smoke at the scene after the explosion.