UPDATED: Police Confirm Four Dead In Jumping Castle Tragedy

UPDATE: A fourth child has died, with several others in a critical condition after a jumping castle incident in the state's north on Thursday morning.

Emergency services along with the Westpac Rescue Helicopter were called to Hillcrest Primary School in Devonport about 10am, after a freak wind event caused the jumping castle to lift into the air.

Two girls and two boys, all in year 6, were confirmed dead by police on Thursday afternoon.

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"Several children fell from a height of about 10 metres around 10am and are currently receiving medical treatment at the scene as well as in hospitals," Tasmanian police said in a statement.

Describing the scene as "distressing", Commander Debbie Williams confirmed from school grounds in the early afternoon after a second fatality had been confirmed.

"Tragically I can confirm that there are two deceased children after an incident today at Hillcrest Primary School," Commander Williams said.

"This is a very tragic event, and our thoughts are with the families and the wider school community, and also our first responders.

"There is no doubt that this has been a very confronting and distressing scene," she said.

"Counselling is being made available to the families affected by this in the school community along with the first responders."

- Commander Williams

Police are expected to hold a media conference in Devonport late this afternoon.

It is currently unknown how many children have been injured.

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