Tata Motors stock falls after boss Karl Slym's death plunge 27 January 2014 Last updated at 11:05 Tata Motors stock fell by more than 5% on Monday as Thai police said they were investigating the possible suicide of the firm's managing director Karl Slym. On Sunday Mr Slym fell to his death from the 22nd floor of a hotel in Bangkok, where he was attending a board meeting of the company's Thai unit. Police say they are examining a note apparently left by Mr Slym. Aged 51, the British-born executive ran all India-based Tata Motors operations except Jaguar Land Rover in the UK. Mr Slym, who was from Derby, England, had worked for Toyota in the UK, and then General Motors in India and China. Following news of Mr Slym's death, Tata Motors stock fell to 350.25 rupees (£3.37; $5.59), down 5.47% from 365.80 (£3.53; $5.83) rupees when markets opened, the Press Trust of India reported. Police in the Thai capital say they are working on the assumption that Mr Slym committed suicide. Police official Somyot Boonyakaew said investigators "didn't find any sign of a struggle" in the room Mr Slym was sharing with his wife in the Shangri-La Hotel. We found a window open. The window was very small so it was not possible that he would have slipped," he told Reuters news agency. He would have had to climb through the window to fall out because he was a big man. From my initial investigation we believe he jumped. The three-page note in English which Mr Slym apparently left has been sent for analysis to confirm it was written by him. A post-mortem on Mr Slym's body is expected to be carried out on Monday. Tata Motors has declined to comment on the possible cause of Mr Slym's death. Tata chairman Cyrus P Mistry described Mr Slym as "a valued colleague who was providing strong leadership at a challenging time for the Indian auto industry."