Hong Kong leader John Lee has addressed the deaths of monkeys kept at a zoo in the city, saying the “problem must be contained” after a ninth animal died and the health of a 10th was being monitored. The government issued a statement late Monday disclosing the death of another white-faced saki kept at the Hong Kong Zoological and Botanical Gardens in Central. The news followed an earlier announcement revealing the deaths of eight monkeys – including three critically endangered cotton-top tamarins – on Sunday. The monkeys found dead also included a De Brazza’s monkey, a common squirrel monkey, …