Shanghai police have arrested 1,788 people after an investigation into a series of online crimes including gambling and the disclosure of customer information involving online trading.

According to Cao Zhongping, chief caption of Shanghai Public Security Bureau’s network security department, police cracked 954 web crime cases and busted 108 criminal gangs. One of gambling cases involved more than 70 billion yuan ($11.2 billion) — the largest-ever online gambling case in Shanghai.

Around 3.1 million yuan ($497,000) was seized in that case, Cao said.

Meanwhile, 11 people from Yihaodian.com were caught for leaking customers’ personal information.