Zookeeper Le Thi Ngoc Mai, 52, asked her 53-year-old colleague Nguyen Van Bay to help her learn to how to drive in the zoo.

Saigon Zoo and Botanical Gardens
Bay agreed and asked Mai to drive one of the zoo’s trucks. Just a few minutes later, the truck controlled by Mai hit into a group of four visitors who were sitting on a bench.
Three, including 49-year-old American men named Robert Conte and two Vietnamese women Phan Thi Ngoc Bich and Dang Thi Chau were injured and immediately hospitalised.
According to District 1 police, Conte and Chau’s condition have improved than Bich who is facing serious injuries.