Education Minister Leighton Andrews has demanded answers from the WJEC where an inquiry is under way.
A Welsh Government spokesperson said:
"We are aware of these allegations and the Minister has demanded immediate answers from the WJEC. As the qualifications regulator for Wales, the Welsh Government takes seriously all allegations of malpractice. We will work with the regulators in England (Ofqual) and Northern Ireland (CCEA) to ensure that qualifications give a fair and reliable indication of knowledge, skills and understanding so that the public can have confidence in the qualifications system.
"Together with the regulators in England and Northern Ireland we are commencing an investigation into these allegations. The regulators are meeting with the awarding organisations concerned today to get a fuller picture of what has happened and will then take any appropriate action promptly and consistently across the three countries. If there is evidence of malpractice, the regulators will work together to take action. Such action, if necessary, would form part of our normal regulatory activity.
"We understand that WJEC is investigating specific allegations made by the Daily Telegraph regarding statements given by senior examiners at recent training events."