A businessman bound and blindfolded by robbers kicked a door inside his Tsim Sha Tsui restaurant for about an hour yesterday before being discovered by a passer-by. The 37-year-old's ordeal began shortly before 5am while he was making tea in the kitchen of his Austin Avenue Italian restaurant, Red, after work. Police said staff apparently left the restaurant's main door unlocked after they left. 'Three men rushed into the kitchen and threatened me with a knife. They used tissue paper to cover my eyes before blindfolding me with tape and tying up my hands and legs,'' said the man, surnamed Law. The robbers stole $67,000 which was on Mr Law, plus $300 from the cash register. The businessman said the money was to pay the rent and purchase goods. 'I scrambled out of the kitchen and shouted for help until I almost lost my voice, but no one could hear me. I took a brief break before kicking the door, which alerted a male passer-by,'' Mr Law said. The pedestrian entered the restaurant and helped free him before making a report to police at about 6am. Mr Law was unhurt in the incident. Last night, officers were looking for the robbers, who are thought to be in their early 30s. Mr Law said the restaurant opened at the beginning of the year and was popular with celebrities. The robbery comes after the head of the Tourism Board, Selina Chow Liang Shuk-yee, voiced concern about an apparent increase in crime in the prime tourist district of Tsim Sha Tsui and called on police to take action. Her comment was made after she was shocked by a bird's nest shop robbery in Nathan Road this month, during which two men armed with a pistol and knife tied up two female shop attendants before taking $600,000 worth of goods and cash.