Senior fireman Siu Wing-fong requested assistance over a radio at least twice while trapped on a smoke-filled Mong Kok rooftop before borrowing a telephone to call 999, the last person to see him alive told an inquest yesterday. Cornwall Court resident Ngan Yuen-wah was sheltering on the roof from a fire in a downstairs nightclub that killed Siu, 46, another fireman Chan Siu-lung, 25, resident Lau Koi-nui, 77, and nightclub employee Man Sau-king, 39. The fire, which raged for six hours, started at the Sun Wah Karaoke Nightclub on the mezzanine floor of the building at 9am on August 10, 2008. Ngan said she was on the staircase of the Nathan Road building when cleaner Szeto Sompan warned her about the fire. They ran seven flights to the 15th-floor rooftop but became trapped in a corner by the thick smoke, facing the adjacent May May Building. About 20 minutes later, Ngan heard someone knocking on doors a few floors below and shouted for help. Later, she heard a man's voice from behind asking them where they were. She waved her hand and the man grabbed it. He also turned on a nearby tap so that she could wet her blouse to cover her mouth. 'I heard him ask for help [over his radio]. He said that he was a senior fireman,' Ngan said. 'Then he asked if I had a phone ... I called 999 and passed the phone to him ... he said that the situation on the 15th floor of Cornwall Court was bad and he urgently needed support.' She heard a beeping sound but she did not know where it came from. Also, she could not tell if the senior fireman was wearing a mask, but his voice sounded clear. She knew there was a second man on the rooftop because she heard the senior fireman taking to him. As the smoke started to clear, more firemen arrived, Ngan said. One of them grabbed her arm and asked her to turn around. As she was being led away, she kicked something, looked down and saw the senior fireman's body. While walking to the other side of the rooftop, she saw another fireman lying in a passageway. Ngan and Szeto escaped by climbing up a ladder and onto the rooftop of the May May Building. Another Cornwall Court resident, Chiu Wai-ming, told the court that he could not recognise the dead firemen. But he said that a fireman in his 20s and one in his 40s went into his flat that day. An oxygen tank carried by the older, taller fireman, was beeping, he said. Four residents, including a woman in her 70s whose legs were black, left the building through his flat onto a ladder, he said. But he did not leave with them until later on when smoke started getting into his room. Lawyer Loretta Lo Yee-hang, who represented Siu's wife, Amy Huen Mei-ying, objected to Siu's cohabiting girlfriend of eight years giving evidence. But Coroner William Ng Sing-wai allowed Lo Sau-lan to be a witness despite not being on an official list. She said Siu could not sleep well and had skin problems because of stress. Huen told the court on Tuesday that Siu was in good health. The inquest continues today.