Two more listed firms warned yesterday that their profits would be hurt by the Sars outbreak. Jewellery retailer Tse Sui Luen Jewellery (International) said the number of tourists visiting its stores had dropped dramatically following a World Health Organisation (WHO) warning against non-essential travel to Hong Kong. '[There was] a corresponding significant decrease in turnover being recorded in our Hong Kong operations during April,' the company said. The company said its turnover last month was about 45 per cent down on the same period last year. It added that the continued travel warning and the escalation of the disease on the mainland meant it was unable to estimate the ultimate impact of Sars on its full-year results. Meanwhile, Growth Enterprise Market-listed bus and tour operator Argos Enterprise (Holdings) warned that its second-quarter and first-half results were likely to be hurt by the spread of Sars on the mainland. The company said the number of customers using its public and tourist bus routes in Jiangsu and Sichuan provinces had fallen significantly. Central government moves to curb the spread of Sars during the mainland's Labour Day holiday break had also put a damper on its business as bookings were cancelled for its tourist bus routes, chartered bus services and tour services. Disinfection operations for the company's bus fleets had also raised costs, it said. The company said it had reduced bus frequencies on affected routes and was encouraging employees to apply for outstanding leave.