A new report by German broadcaster SWR has revealed more evidence in the allegations of doping against Bundesliga clubs VfB Stuttgart and SC Freiburg, in the 1970s and 1980s.

SWR's report states that they have obtained first-hand evidence in documents from Freiburg prosecutor's office, showing the supply of various substances by Armin Klümper. The files come from a court case against Klümper in 1984.

According to the information, Klümper was apparently mainly involved with Bundesliga club Stuttgart, with only a single shipment of anabolics to SC Freiburg, the other football club involved in the scandal, in 1979.

It's reported that numerous handwritten invoices were found in the documents, which are addressed to the Stuttgart club on which drugs and their amounts are listed in detail. The deliveries also included the steroid Megagrisevit, then a well-known and banned doping agent. The deliveries had a total value of more than 117,000 German marks (87,000 euros or $93,000 in today's currency).

Club knowledge about doping?

The name of former VfB Stuttgart club president Gerhard Mayer-Vorfelder was - according to SWR - also on a number of the delivery invoices, which suggests the club may have known about the doping practices.

During the indictment against Klümper in 1984, Mayer-Vorfelder said it was important to him that no banned substances were delivered to the club. He was apparently assured by a club physiotherapist that this was not the case.

Last week, researchers at the University of Freiburg went public on the first case of anabolic doping in the Bundesliga. Germany coach Joachim Löw, who played for both Stuttgart and Freiburg during the period in question, has made a statement distancing himself from the allegations whilst condemning doping in sport.

79-year old Klümper, a former professor in sports medicine, is now living in South Africa and has not yet commented on the accusations.