Overview

• Nine monkeys, including critically endangered cotton-top tamarins, died at Hong Kong's oldest zoo over two days.
• Experts have been called in to perform necropsies and toxicological tests to determine the cause of death.
• Part of the zoo has been sealed off and disinfected; one De Brazza's monkey is under observation for unusual behavior.
• Concerns have been raised about potential zoonotic diseases, with experts warning of pathogens transmissible to humans.
• Hong Kong's government held an urgent interdepartmental meeting to address the situation and monitor other animals.