The US government is expected to join a lawsuit against Lance Armstrong after talks with his lawyers broke down.

The suit argues Armstrong defrauded the American public by insisting he was not using drugs while riding for the publicly funded US Postal Service team.

Last month, Armstrong admitted using performance-enhancing drugs during all seven of his Tour de France wins.

The suit, filed by his former team-mate Floyd Landis, aims to recover sponsorship money from Armstrong.

More to follow.