12/05/2016 18:18 BST

Heartbreaking Moment Elephant 'Sheds Tears' Before Dying At Indonesia's Bandung Zoo

'Bandung Mayor posts Instagram shots with elephant before it dies.'

This is the heartbreaking moment an elephant appeared to shed tears as it died in squalor at Indonesia's Bandung Zoo.

Yani the 34-year-old Sumatran elephant died on Wednesday night while laying on the ground in chains at the zoo in West Java.

Zookeepers were said to have moved Yani from her cage, where she had spent most of her life, after she fell ill last week.

TIMUR MATAHARI via Getty Images
Yani the Sumatran elephant appeared to shed tears before she died at Indonesia's Bandung Zoo

An investigation has been launched but the cause of Yani's death has not yet been established.

Keepers at the zoo insisted they did all they could, providing the animal with medicine and consulting vets, the Mirror reported, but it has since emerged that the zoo has been without a resident vet for almost a year. 

The West Java Nature Conservation Agency (BKSDA) slammed the zoo for not assigning a vet to Yani, according to

“Having a vet is mandatory [for a zoo]. They haven’t had one for a year,” said Sylvana Ratna, head of West Java BKSDA.

TIMUR MATAHARI via Getty Images
The zoo has been without a resident vet for almost a year

Bandung Mayor Ridwan Kamil visited Yani in her dying days and posted a picture on his Instagram account feeding and patting the animal. 

Following the visit he said: "If they don't have the budget to manage (the zoo), they should seek support."

More than 10,000 people are said to have signed a petition calling for the zoo to be cleaned up.

Femke den Haas of the Jakarta Animal Aid Network has been quoted as saying the rules governing Indonesian zoos are not clear enough, and that Yani's case is "really just the top of the iceberg". 

The WWF estimates there are between 2,400 to 2,800 Sumatran elephants left in the wild. The animal is classified as critically endangered by the International Union for Conservation of Nature.