Four hospitalised after Puckapunyal army base tanks crash An army tank takes part in exercises at the Puckapunyal military base. THREE men have been flown to hospital with serious injuries after two army tanks collided at a Victorian army base. Ten people were injured when the vehicles collided about 10.30am (AEST) at the Puckapunyal Army Base in central Victoria. Three men were airlifted to Melbourne hospitals in serious but stable conditions, Rural Ambulance Victoria spokesman John Mullen said. A fourth person was taken to Royal Melbourne Hospital by road in a stable condition. A further six people suffered minor injuries and were being assessed at a medical centre on the army base. Mr Mullen said it was unlikely the six people would be taken to hospital. The Australian Defence Force and Victoria Police are investigating the collision. A police spokeswoman said officers would investigate whether there was any criminal negligence stemming from the crash. If there was no negligence, the investigation would be handled by the Defence Force, she said. AAP has contacted Defence, but a spokeswoman is yet to provide a response to inquires.