A man claiming to be a Hong Kong migrant, who suffered horrific burns with his girlfriend in a gas blast in Shenzhen, has disappeared after refusing doctors' help. Shenzhen police yesterday were searching for Wong Wah, 53, a chef who says he migrated to Australia from Hong Kong more than 10 years ago. Mr Wong and his 44-year old mainland girlfriend, Xiong Meizhen, suffered third-degree burns affecting more than 90 per cent of their bodies in a gas explosion at an apartment in the Lowu district late on Monday night. Police said the explosion was believed to have been caused by a gas leak in the kitchen. Despite their horrific injuries, Mr Wong insisted on not calling for help and took Ms Xiong to hospital by taxi. Doctors were shocked by the extent of the couple's injuries. They were taken to the intensive care ward, but Mr Wong refused to be admitted and disappeared from the hospital after saying he was going to the toilet. 'We don't know why he wanted to leave so much. But with those kind of injuries, I fear for his life if he is not properly treated,' one hospital doctor said. Ms Xiong was still in a coma yesterday. A friend said the couple had met via a Hong Kong matchmaker about a week ago. 'They were both divorced. They originally planned to get married in the Lunar New Year,' said the friend, Xiong Qian. She added that Mr Wong had shown them his Australian passport and said he was single and had no children. 'He appears to be a polite and mature person. We have no idea why he left so abruptly. After the accident happened, my friend tried to call the police for help but the man refused. He said he would abandon her if she ever called the police.' Xiong Qian said her friend had tried to stop the man from leaving but had failed.