A sign for wholesaler Vleesgroothandel Willy Selten B.V. , is seen in Oss April 11, 2013. Dutch food safety authorities have ordered the withdrawal of about 50,000 metric tons (55116 tons) of beef from sale over concerns it might contain horsemeat. The Netherlands Food and Consumer Product Safety Authority (NVWA) said in a statement on Wednesday it had told more than 130 Dutch meat-processing firms to trace the meat, all of which had come to them from two Dutch wholesalers, and withdraw it. The wholesalers involved were Wiljo Import en Export B.V. and Vleesgroothandel Willy Selten B.V. REUTERS/Bart Maat (NETHERLANDS - Tags: FOOD AGRICULTURE BUSINESS HEALTH LOGO)