Police in Greece say 10 people have been arrested as part of a match-fixing probe based on irregular betting patterns identified by European football's ruling body UEFA.

The suspects, all Greek men, were arrested Tuesday in Athens and the country's second largest city, Thessaloniki, and are being held on charges of participation in a criminal gang, according to police.

Earlier this month, seven other suspects were arrested on less serious charges of breaking gambling laws as part of the same probe.

The investigation was launched after UEFA handed Greek authorities a report citing irregular betting patterns, mostly involving Greek Cup and Division 2 games in 2009 and 2010.