Welsh Athletics has vowed to carry out an internal review after a second drugs scandal hit its team at the Commonwealth Games.

European 400 metres hurdles champion Rhys Williams, the co-captain of Wales’s athletics squad in Glasgow, has been provisionally suspended and will miss the event after failing a drugs test.

The 30-year-old son of rugby union great JJ Williams becomes the second Welsh athlete to be forced out of the Games over an alleged doping offence, after 800m runner Gareth Warburton was withdrawn nine days ago.

He said he was “utterly devastated” by the news of his failed test and insisted, like Warburton, that he had never knowingly doped.

However, Welsh Athletics admitted it was “concerned” to see a second member of its team charged with committing an anti-doping rule violation.

The body said in a statement: “Rhys has the opportunity to respond to the charges against him and to have those charges determined at a full hearing before the national anti-doping panel.

“Welsh Athletics strongly supports clean sport and has established a comprehensive education programme for its athletes.

“Welsh Athletics is obviously concerned that this is the second anti-doping violation by a senior Welsh international athlete and will be conducting its own internal review.”