NANJING, July 18 (Xinhua) -- Police in China's Jiangsu Province have caught 23 people in an online gambling case involving over 4.2 billion yuan (626 million U.S. dollars).

Thirty-three servers and more than 40 mobile phones were confiscated, and 65 bank accounts have been frozen, police in Zhenjiang city said Tuesday.

Police noticed an advertisement for an online gambling website earlier this year. An investigation showed that an online gambling gang, with members in more than ten provinces and regions in China, has set its primary server in the Philippines, and used a rental server in China to support the websites.

The gang was busted on May 23. It made an illegal profit of more than 700 million yuan since its operation in 2016, police said.

The case is under further investigation.