Zoo workers lay flowers at a Panda statue days after the 19-year-old panda Chuang Chuang died at the Chiang Mai zoo, Chiang Mai, Thailand, September 18, 2019. Dailynews/ via REUTERS

BANGKOK: Animal experts from China are to arrive at a Thai zoo on Thursday (Sep 19) to investigate the unexpected death of a giant panda in the northern city of Chiang Mai, Thai officials said.