Seven people on a Qantas flight from Hong Kong to Perth were injured in severe turbulence early yesterday. About four hours after QF68, with 206 passengers and 13 crew on board, left Hong Kong on Sunday night it plunged about 240 metres after striking an air pocket over Borneo. Three children and one crew member were among those who suffered the minor injuries. It was not immediately known yesterday whether any Hong Kong residents were among the injured. Australian media reports said the plunge, which lasted about 15 to 20 seconds, threw passengers into a panic, with some describing it as 'like falling out of a 30-storey building'. Several passengers whose seat belts were not fastened were hurled around the cabin, the reports said. One passenger, Keith Huxtable, said: 'It was dark ... people screamed.' He said it felt as though the plane had turned upside down. Another passenger, Michelle Knight, said a friend of hers had cracked her head on the roof during the sudden fall. Ms Knight said: 'Things went everywhere. It was pretty scary and everyone was sort of panicking for a second, not knowing what to do or expect next.' Qantas spokesman David Epstein said the pilot aboard the Airbus A330, Brett Flack, had decided it was safe to fly on to Perth after the injuries had been reported to medical authorities in Australia. The aircraft was believed to have encountered convective turbulence, not normally visible to weather radar. All the injured were discharged from Perth hospitals, he added. On a Perth flight from Singapore last year nearly 50 people on board a Qantas A330-330 were injured when it plunged at least 100 metres.