A woman lost all her $150,000 savings and $150,000 borrowed from her sister in an investment scam. The woman, 39, attended a job interview in San Po Kong last month after reading a newspaper advert for an office assistant's job for $7,000 a month. She was persuaded to invest her money in silver, but then 'lost' the investment and was told she owed the company another $17,000. Police are hunting three men and a woman.