Rangeland Foods is withdrawing some batches of burgers after they tested positive in the UK for between 5-30% horsemeat, the Food Safety Authority of Ireland has confirmed.

Rangeland Foods has re-commenced production after consulting with the Department of Agriculture.

The owner of McAdams Foods, the Monaghan company at the centre of the horsemeat controversy, has said he sourced products from Poland after clients requested lower-cost material.

The Irish beef trader named as the supplier of horsemeat by ABP Food Group has said he is confident of being fully exonerated when investigations are complete.

Taoiseach Enda Kenny has committed to resolving the horse meat crisis after food safety chiefs warned of fraudsters drip-feeding contaminated product into the food chain.

Agriculture Minister Simon Coveney will brief a parliamentary committee on the horse meat controversy today after a second processing plant tested positive for equine DNA.

The Garda Fraud Squad has been called in to investigate the deepening horsemeat scandal after beef product at a Monaghan processing plant was found to contain 75% equine DNA.

Supermacs has confirmed tonight that it buys its beef burgers from Rangeland Foods.

A second Irish meat processing plant has tested positive for traces of horse meat.