THE Housing Authority headquarters in Ho Man Tin were forced to close for three hours yesterday after a group of tenants opposing eviction stormed the building. Security guards were taken by surprise as the 17 banner-waving protesters sneaked in through a rear door at about 11 am. The protesters included Lam Yuet-hing, the last remaining tenant in Kwai Shing East Estate, who was due to be evicted today after holding up the redevelopment of the estate for four months. Mr Lam, his wife, and two children have been living in the estate for 21 years. He insisted on being rehoused in a 485 square feet two-bedroom unit in Kwai Fong Estate near his parents' flat. Protesters struggled with the guards and some tried unsuccessfully to fight their way to the office of authority chairman Rosanna Wong Yick-ming on the 10th floor. Officers immediately locked the lifts, barricaded corridors leading to the upper floors, and closed all entrances. The protesters moved to a ground-floor atrium where they staged a sit-in. Housing applicants were barred from entering the building, and some staff were stranded outside. Mr Lam later accepted an offer by chief housing manager (redevelopment) Joseph Lee King-chi to relocate him to another Kwai Fong Estate unit, several blocks away from his parents' home. The Kwai Shing Estate redevelopment aims to transform the ageing estate into a modern complex providing accommodation for 4,900 families in seven blocks. Meanwhile, a group of Ma Tau Kok shopkeepers evicted from their stores two weeks ago have threatened to use force to ''re-occupy'' the premises. They said they would return to the site today to ''get back their property from the Government's hands''.