UK Anti-Doping says it is investigating allegations of wrongdoing in cycling.
Ukad is looking into former Team Sky rider Jonathan Tiernan-Locke’s claims that painkiller Tramadol was “offered” at the 2012 Road World Championships.
British Cycling has put the allegation to the medic in question, doctor Richard Freeman, who has denied it.
It is understood Ukad is also looking into an allegation in the Daily Mail that a medical package was delivered to Team Sky by a British Cycling doctor.
The delivery was allegedly made in France on 12 June, 2011, the day Sir Bradley Wiggins won the Criterium du Dauphine in La Toussuire.
Team Sky said they had conducted an internal review and were “confident there has been no wrongdoing”.
“We informed British Cycling of the allegation and asked them to contact Ukad, who we will continue to liaise with”, they said.
British Cycling says it has not identified the substance in the package.
A spokeswoman for Ukad said in a statement: “UK Anti-Doping is investigating allegations of wrongdoing within cycling. In order to protect the integrity of the investigation, we will not comment further.”
More to follow.