BERLIN, Oct. 31 (Xinhua) -- German federal police on Wednesday searched the homes and former offices of two doctors in Freiburg who are suspected of providing performance-enhancing drugs to cyclists.

"The doctors are accused of having used or rather provided banned substances to several sportsmen, including cyclists," said a police statement.

Prosecutors ordered the searches as part of an investigation against doctors Andreas Schmid and Lothar Heinrich, both specialists in sports medicine, on suspicion of illegally handling prescription medicine, police spokesman Wolfgang Maier said.

Both Schmid and Heinrich admitted in May to helping dope cyclists, but they were protected against doping charges by the statute of limitations.

The University of Freiburg, to which the clinic belongs, terminated both doctors' contracts after their confession.

Prosecutors, however, were able to put the two under investigation for allegedly breaking the nation's laws governing the handling and use of prescription medicine, Maier said.

Maier said the searches were aimed at confiscating records from the doctors' time with the T-Mobile cycling team, as well as any prescriptions for substances used in doping and receipts from travel with the team.

Earlier last week, former T-Mobile rider Patrik Sinkewitz testified and gave "useful information" to German cycling federation, in a bid to receive a lenient sentence for doping.

Sinkewitz tested positive for elevated testosterone levels during training on June 8.

German cycling has been hit by doping scandals reaching from the professional to the amateur ranks. A doctor for Germany's Olympic team recently admitted providing performance-enhancing testosterone to riders as far back as 1980.