Catering company Compass said today that Irish sites where it operates had been supplied with burgers from Rangeland - an Irish processor found to have had two consignments of meat with horse DNA.

Some burgers manufactured by Monaghan meat processor Rangeland Foods for the British wholesale and catering trade contained up to 30% horsemeat, according to tests.

A horse drug dangerous to human health was not in horsemeat used in Findus products on Irish supermarket shelves, tests have confirmed.

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 Food Safety Authority of Ireland has confirmed it was acting on concerns about the meat trader at the centre of the horse DNA scandal as early as October.

The meat supplier at the centre of the horsemeat controversy has said it has passed the details of the Polish supplier to the Irish authorities.

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.

The Department of Agriculture is building an investigation with the help of gardaí into the origin of horsemeat in Irish burgers with the anticipation of future legal and compensation cases.

The Irish Cattle and Sheep Farmers Association is calling on any meat processors who may have concerns about their own products to come forward immediately.

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.

Taoiseach Enda Kenny has said that the Cabinet will be briefed this morning on the latest developments in the horsemeat scandal.

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.

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.