Just days before the relay supporters of Falun Gong demonstrated in front of the Chinese embassy in the Malaysian capital. As many as 1,000 personnel from the special police unit were expected to be deployed on the day of the relay. A Japanese family with Malaysian citizenship and their 5-year-old child who unfurled a Tibetan flag were hit by a group of Chinese nationals with plastic air-filled batons and heckled by a crowd of Chinese citizens during the confrontation at Independence Square where the relay began, and the Chinese group shouted: "Taiwan and Tibet belong to China." Later during the day, the Chinese volunteers forcefully took away placards from two other Malaysians protesting at the relay. One of the protesting Malaysian was hit in the head.
Try to answer this question if possible (otherwise reply "unanswerable"): What were a Japanese family who unveiled a Tibetan flag hit with?
plastic air-filled batons