Five clubs in Albania, Latvia, Slovenia and Hungary are suspected in European football’s biggest match-fixing investigation, UEFA said on Wednesday.

The European football body identified the clubs as KF Tirana, FC Dinaburg, KS Vilaznia, NK IB Ljubljana and Honved and said they allegedly fixed seven qualifying round games in the Champions League and Europa League between July 16 and August 6.

UEFA general secretary Gianni Infantino described match-fixing as a “cancer we need to eradicate.”

He said the seven matches were among 40 in continental club competitions previously identified as being under suspicion. They also figure in about 200 suspect matches being investigated in a criminal probe led from Bochum, Germany.

Infantino said UEFA also has opened its own investigation into the activities of three referees and one official connected to UEFA. No member of UEFA’s administrative staff is suspected, he said. “We don’t know if this is the end of the story,” Infantino said. UEFA is cooperating with the Bochum prosecutor’s office which has targeted domestic league matches across nine countries. German-based betting syndicates are suspected of bribing players, coaches, referees and other officials to fix games and the suspected leaders are believed to have made at least euro10 million.

UEFA officials met with national association leaders from the nine countries — Austria, Belgium, Bosnia, Croatia, Germany, Hungary, Slovenia, Switzerland and Turkey — to share information about the investigation on Wednesday.