The amount of money suspected stolen from a stockbroking firm which shut down suddenly after its boss went missing on Monday rose to $110 million last night after 152 clients complained to police. Ying Kit Stock Company proprietor Lam Kwan-kit, suspected of stealing his clients' assets, was believed to still be in Hong Kong as no border checkpoint records showed he had left, a police source said yesterday. Lam was last seen by his wife on Sunday when he left their Sheung Wan flat without luggage. She told police she did not know where he had gone. Yesterday, she was seen helping police with their investigations at the firm's office in the Wing On Cheong Building, Wing Lok Street, Sheung Wan. Police last night searched the office and took away a large quantity of documents. Superintendent Eric Wong Tat-wah, from the Commercial Crime Bureau, said: 'The amount of money the clients claim is involved is at least $110 million. We have classified the case as theft. We suspect the company's proprietor has stolen his clients' assets and we are still hunting for him. 'We are checking with Hong Kong Securities Clearing Company, the brokerage's trading records and clients' records to find out the exact amount missing.' Police and Securities and Futures Commission staff were yesterday at the brokerage office to check company documents. The alleged theft came to light on Tuesday when several clients went to the brokerage to sell stocks but found the owner had disappeared.