Tourists are concerned after spotting orangutans "eating rubbish and leftovers" at a zoo in Indonesia.

According to a visitor at Medan Zoo, a male Borneo orangutan named Simba was seen looking "weak and hungry".

Lamhot Siahaan who visited the zoo on February 19 said he was "very concerned" at the condition of the primate and also claimed no food was seen and the orangutans were eating rubbish or leftovers.

According to local reports, the same zoo saw the deaths of three Sumatran tigers and another four are critically ill.

The Jakarta Post reported the tigers were severely ill as a result of institutional mismanagement and a funding crisis, prompting the central government to intervene in the zoo’s operations to help care for the animals.

Kalimantan/Borneo orangutan (Pongo pygmaeus) named Simba, male at Medan Zoo, North Sumatra, Medan City. Looking weak and hungry, this animal lacked food, so one of the females, Hamidah, reportedly died some time ago. One of the visitors to the Medan Zoo named Lamhot Siahaan admitted that he was very concerned about the condition of the protected animals. He also wanted a government team to pay attention to the condition of the animals at the Medan Zoo, because it was all the way from the Medan Zoo. He started to see these animals. No food was seen, but the orangutans were seen eating rubbish or leftovers from previous food

Orangutans at the Medan Zoo are starving, and another one named Hamidah has reportedly died