Police officers critical after explosion at Middle Park flat Emergency services at the scene of the explosion in Middle Park. Picture: Mike Keating Source: News Limited THREE police officers are fighting for their lives after an explosion in a flat at Middle Park on Saturday night. The injured officers include a female who suffered burns to 90 per cent of her body and is in a critical condition at The Alfred hospital. Emergency services including two fire fighters responded to an incident in Hambleton St around 9pm and had just gained entry to a second floor flat when the explosion occurred. A man and a woman are also in a critical condition with burns to 35 per cent of their bodies at The Alfred hospital. Police outside the block of flats in Hambleton St, Middle Park, where the explosion occured. Picture: Mike Keating Two firefighters are being treated at the Royal Melbourne Hospital. Acting assistant commissioner Doug Fryer said he had "extreme concerns for the welfare" of the officers. He said police attended the flat for a welfare check on a man aged in his 30s. "When the members entered almost immediately there has been an explosion," acting assistant commissioner Fryer said. The male occupant is now in hospital. We're not quite sure how the explosion occurred ... there could have been injuries to other people, thankfully there were not. This is part of the danger of law enforcement. Most days everyone gets home but unfortunately we've had a tragedy tonight. Neighbour Matthew Campi said he heard a loud bang. "I looked out the window and saw embers and smoke everywhere," Mr Campi, 22, said. People were screaming and it looked like police were being hosed down with water. He believed there was a gas explosion in the unit. The entire building shook all I could see was smoke billowing from the top floor. The arson squad are at the scene. For information about the prevention of suicide contact Lifeline on 13 11 14.