Approved supplier Welsh Bros Foods confirmed a sample of its frozen minced beef has 'potentially tested positive' for above 1% horsemeat.
Wholesaler Castell Howell have contacted customers after a 'possible contamination' of cottage pies.
The Welsh Government says it is working with the police to ensure allegations of horse meat at a plant in west Wales are dealt with.
The Welsh Affairs Committee says it is 'concerned' following news that horsemeat has reportedly been found in a batch of mince produced by a supplier in Wales.
– Welsh Affairs Committee spokesperson
The Food Standards Agency and police are leading an investigation into this serious matter and the Committee does not want to jeopardise those investigations. We will pay close attention to how the situation develops. The Committee stands ready to conduct its own investigation if necessary.
Pembrokeshire County Council has withdrawn mince from its menus after being told a batch of frozen minced beef has potentially tested positive for horsemeat.
The mince was supplied by Welsh Bros Foods of Newport, Gwent, and was used by the council for schools, day centres and residential homes.
The council says it has also been made aware that frozen beef products supplied to Sodexo – a company providing catering services to the authority's privately-financed initiative school in Pembroke Dock – has tested positive for horsemeat.
Sodexo has withdrawn all frozen beef products from its UK catering operations.
Beefburger products made by a mid-Wales company have been withdrawn after tests revealed the presence of horsemeat.
The Food Standards Agency say three samples tested positive for at least 1% horsemeat in tests carried out by Powys County Council.
Our West Wales reporter Kevin Ashford sent us this report from Llandrindod Wells.
Beefburger products made by a mid-Wales firm have been withdrawn after tests revealed the presence of horsemeat.
Three samples of beefburger products made by Builth Wells catering supplier The Burger Manufacturing Company tested positive for at least 1% horsemeat.
The test were requested by the Food Standards Agency and carried out by Powys County Council.
Further tests will now be carried out to establish how much horsemeat the products contain and to test for the presence of the veterinary medicine phenylbutazone.
The FSA said the company is contacting its customers to inform them of the results and to recall any affected products.
The company that made the products withdrawn from sale by Castell Howell has said they have an "exemplary record" in food quality and safety standards. Oak Farm Foods has launched a internal investigation into the matter.
– An Oak Farm Foods spokesperson
Now that we have received the necessary information we have issued notification to all customers holding any potentially affected product from this product line.
While the company carries out extensive testing on all its products DNA testing has not been widely available or the norm in the industry. However, given recent issues Oak Farm Foods has instigated a new regime that includes DNA tests. We can confirm that all tests for equine DNA on products to date have tested negative.
A nursery in the South Wales Valleys and a nursing home in Gwent both bought the cottage pie from Castell Howell wholesalers.
The pie was made by Oak Farm Foods; five customers in total are believed to be affected.
The opposition in the Assembly have said more needs to be done to restore confidence in Welsh meat following the horsemeat scandal.
– Shadow Minister for the Environment Russell George AM
The cross-contamination of meat remains an issue of great concern, not just to members of the public but also to the industry itself, where the majority of small honest businesses are having their reputations severely damaged. It is crucial that we receive further information on the extent of contamination in our schools and hospitals as soon as it is available. It is clear that an improved and rigorous testing regime is going to be at the heart of restoring industry integrity and public confidence.
– Welsh Liberal Democrat Rural Affairs Spokesperson William Powell AM
While I commend the swift action taken by the UK Government and the support offered by the Welsh Government; it is clear that a historic network of criminality and wrong doing has been exposed. This must be addressed at the European level. This scandal has clearly demonstrated the value of a short and transparent food chain and ensuring that the very best quality meat produce is available for sale on the shelves of supermarkets and in our butchers.
Restoring confidence in the quality of our food is now a top priority, according to the Welsh Government minister dealing with the horsemeat scandal. Alun Davies has just told AMs that he's held talks with retailers about reassuring consumers.
– Deputy Minister for Agriculture Alun Davies AM
Food in the United Kingdom is very, very safe. Food poisoning is at very, very low levels.The amount of contamination and the amount of adulteration is very, very small. So consumers have every reason to have every confidence in the food that they provide for their families.