The head of a construction company slashed the arm of one of his workers with a metre-long sword during a dispute over pay at a construction site yesterday. The slashing came during a standoff at an office in the Wholesale Vegetable Market in Fat Tseung Street West, Cheung Sha Wan, between workers and the construction boss over $120,000 in wages. The boss, a 47-year-old man surnamed Ngai, was arrested. 'He told us that when so many people surrounded him, he panicked and grabbed the sword in a bid to protect himself,' a police spokeswoman said. 'He claimed the slashing was accidental.' The construction company boss, 10 of his staff and 16 workers employed by a subcontractor were involved. The boss and his staff were surrounded by the workers when the argument escalated. 'The arrested man grabbed a [one-metre long] decorative sword and somehow slashed one of the workers with it,' a police spokeswoman said last night. Police officers equipped with shields stormed the scene and quickly contained the situation. Those involved in the dispute were taken away by police for questioning, while the injured man, 26, was taken to the Caritas Medical Centre for treatment. He is in stable condition. Ngai was arrested on suspicion of wounding.