NYON, Switzerland — UEFA says five clubs in Albania, Latvia, Slovenia and Hungary are suspected in European soccer's biggest match-fixing investigation.

The European soccer governing body named the clubs Wednesday as KF Tirana, FC Dinaburg, KS Vilaznia, NK IB Llubljana and Honved. The clubs allegedly fixed seven qualifying-round games in the Champions League and Europa League between July 16 and Aug. 6.

UEFA says three referees were possibly involved, as well as one official connected to UEFA. They were not identified.

UEFA has opened its own investigation into the seven games and the referees.

UEFA officials met Wednesday in Switzerland with national association leaders from Austria, Belgium, Bosnia, Croatia, Germany, Hungary, Slovenia, Switzerland and Turkey.