Their vehicle bursts into flames with the screaming pair trapped in the wreckage Two people burned to death yesterday in San Po Kong after their car hit a concrete post, became airborne, then burst into flames after crashing into the ground. The victims were Ho Tsz-him, a 22-year-old man, and Hau Ka-man, a 19-year-old woman. Both were trapped in the wreckage as it burned. The car collided with a taxi in Prince Edward Road East. Ho had been driving the car, a Honda Civic. Two other passengers, Chan Kim-hang, a 36-year-old man, and Lo Ka-wai, an 18-year-old woman, were injured and taken to United Christian Hospital for treatment. Police said they believe the car was speeding but they still needed to verify if it was travelling above the 70km/h speed limit. A passing motorist, Yeung Kwong-mo, 29, who witnessed the crash, said Ms Lo managed to climb out of the car before it burst into flames. As he ran to the wreckage to help, he said he saw smoke billowing from the car. 'I saw the male passenger [Mr Chan] put his hand outside the window, and they screamed for help. I immediately grabbed his hand and pulled him out of the car.' A few seconds later, the car burst into flames. Ho and Hau, who were trapped inside the car, kept screaming while the wreckage burned, Mr Yeung said. Firemen put out the blaze but not before the two victims were badly burned. They were certified dead before arriving at the hospital. Mr Chan and Ms Lo were in stable condition yesterday. The taxi driver, Shum Fung, 43, was discharged after treatment. Mr Yeung said he saw several vehicles pass by the accident site but no one else stopped to help. The wrecked car and damaged taxi were towed to a government vehicle plant in Ho Man Tin for examination. Witnesses to the crash should contact police on 2305 7500 or 23057548.