Four people have been injured after a merry-go-round collapsed at a fair in the Indonesian capital, Jakarta.

The ride at the Jakarta Fair arena in Kemayoran in central Jakarta broke down and collapsed on Monday June 10, The Jakarta Post reported.

The authorities have since pointed out that a worn-out steel pole caused the ride to collapse.

Harry Kurniawan of the Central Jakarta Police said on Wednesday that the pole had weakened and was no longer able to hold the weight of passengers.

According to local media, four riders — known only as Noval, 12, Nisa, 30, Juamaidi, 30 and Ita, 41 – were injured after the accident occurred. They were given immediate care from medical personnel.

Local authorities are investigating the incident.