Keepers at the zoo were "very distraught" after the cub was discovered on the edge of the pool inside the tigers' enclosure, a zoo spokeswoman said. "The keepers are naturally very distraught. They work very closely with the tigers, so it is incredibly sad news for them," she added.
Five-year-old Sumatran tiger Melati gave birth to the cub two weeks ago, with the event captured on hidden cameras in the den. Keepers raised the alarm in the early hours of Saturday morning after they noticed they could no longer see the cub.
The zoo spokeswoman said the cub had drowned.