This is the moment a powerful gust of wind overturns a bouncy castle with children on it leaving four of them injured.

The incident happened on Letchikov Street in Ufa, Bashkortostan, Russia, on 27th August.

Video shows the inflatable castle lifting off the ground and flipping over as children are thrown and people rush to help.

The regional branch of the Ministry of Emergency Situations (MChS) said four children were injured.

A five-year-old girl was in extremely serious condition and was taken to intensive care at City Hospital No 17.

The Investigative Committee opened a criminal case.

Preliminary findings showed the trampoline had been installed without authorisation, which could have contributed to the incident.

(Mike Leidig / newsX)