The director of the Danish Cycling Union (DCU) Jesper Worre told DR1 television station that Rasmussen had received a number of warnings over failing to inform doping authorities over his training whereabouts.

"We consider this case with great seriousness and the executive of the DCU decided that Michael will no longer be part of the national team and he was informed of this on June 26," said Worre.

Rasmussen, who rides for the Rabobank team, has said he had received just one warning but Worre insists there have been several notices issued.

Rasmussen currently leads the Tour de France after 11 stages and enjoys a 2min 35sec lead over Spain's Alejandro Valverde.

"It is confidential information but people have the right to know that the DCU fights for a clean sport," said Worre.

However, he added: "The DCU is not saying that Michael tested positive. But there are question marks over his behaviour and attitude" that place doubts over his place in the national team.