At least two fires erupted during last year's fatal Immigration Tower blaze, an immigration assistant told jurors yesterday as he described being engulfed in flames. Senior Immigration Assistant Tam Kwok-ming said he was trying to grab abode claimant Lee Sai-yau, who he said was holding a lit cigarette lighter and an uncapped bottle of liquid, when he heard an explosion. Lee was one of 23 claimants officers had been ordered to remove from Room 1301 of Immigration Tower on August 2 last year. Mr Tam said he turned round to see 'a ball of fire'. 'I raised my right arm to shield my face. My right forearm caught fire,' he told the Court of First Instance. He said he turned to look at Lee, but there was an explosion between them. He crawled over the reception counter to seek refuge. 'I saw three people struggling with their whole bodies on fire.' Mr Tam, who spent 27 days in hospital with burned forearms, was testifying at the trial of seven abode seekers accused of murder and arson. Sze Kwan-lung, 24, Pang Hon-kwan, 40, Fu Mo, 39, Lam Hing-luen, 27, brothers Yeung Yee-ping, 29, and Yeung Yee-yim, 38, and Chau Hung-chuen, 30, have pleaded not guilty to two counts of murder and one of arson. Abode seeker Lam Siu-sing, 26, and senior immigration officer Leung Kam-kwong, 42, died in hospital on August 11 last year - nine days after the blaze. The trial continues before Mr Justice Thomas Gall.