Authorities have searched the Swiss home of German cycling star Jan Ullrich as part of an investigation into alleged doping, state prosecutors in Bonn and the country's federal crime office (BKA) said in a statement.

Officials from the BKA and a team of investigators raided the cyclist's home in Scherzingen near the German border on Wednesday in the course of a broader international probe into suspected doping abuses in the sport, the BKA said.

Ten premises were searched in total, they added.

The 1997 Tour de France winner, who was married last weekend, was not present because he is on his honeymoon.

Wolfgang Strohband, Ullrich's manager, who also had properties in Hamburg searched on Wednesday, said the raids had taken him completely by surprise.

"I wasn't contacted, so I don't know anything," he told German sports news agency SID.

"But we have called in our lawyers. They will look at what steps we should take next."

Ullrich's cycling team T-Mobile sacked him this summer after he was implicated in a Spanish doping investigation. The German has consistently rejected all the allegations.

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