More than 250 Chinese accused of involvement in international telecommunication fraud rings were returned to China on Tuesday to stand trial, the Ministry of Public Security said.

Authorities in Indonesia and Cambodia transferred 254 suspects, all from the mainland, to police. They arrived on chartered flights at airports in Beijing, Shanghai, Hangzhou and Guangzhou, the ministry said.

The telecom fraud occurred in more than 20 provinces and regions across the country, and included 4,000 major crimes in HongKong, the ministry said.