Irish meat plant closes after 'beef' is found to contain 75% horsemeat Rangeland said in a statement last night: "As of this evening Rangeland Foods, Castleblaney Co.Monaghan has temporarily suspended production of beef following the interception of beef from Poland which tested positive for equine DNA. This consignment was received in early January and did not go into production. Upon receiving these results Rangeland immediately reported the matter to the Department of Agriculture. Rangeland has now temporarily suspended production to permit a full investigation. 90% of Rangeland's beef usage is of Irish origin. Silvercrest, the Irish food factory at the centre of the original scandal, suspended all production last month after two thirds of beefburgers tested by officials were found to contain horse meat. Anne McIntosh, chairman of the Commons environment select committee, warned yesterday that Britain's Food Standards Agency had failed to get to grips with the horsemeat affair and said recent cases were just the "tip of the iceberg." She said: "We have had two incidents in two weeks, neither of which was discovered by the Food Standards Agency. The agency must face questions over whether it is fit for purpose. The agency yesterday discussed with supermarkets and suppliers how to prevent contaminated meat from entering the supply chain. It also discussed how much contamination was acceptable in meat.