Hürriyet Daily News reported that prosecutors in Istanbul, Turkey have indicted 504 people accused of participating in a “Grand Bazaar” money-laundering network, with funds involved totaling nearly 40 billion Turkish lira (about $850 million).

Prosecutors said the network used shell companies, jewelry stores, foreign exchange exchange firms, digital payment service providers, and cryptocurrency exchanges to conceal proceeds from illegal gambling activities, among others. Some funds were also converted into cryptocurrencies and transferred abroad. Prosecutors are seeking sentences of up to 34.5 years in prison for alleged mastermind Türker Ak and up to 31 years for alleged network manager Murat Dönmezoğlu.