BEIJING, Aug. 8 -- A total of 40 suspects, 35 from the Chinese mainland and five from Taiwan, were brought back to China from Kenya in police custody on Monday, the Ministry of Public Security said.

Allegedly involved in 60-plus fraud cases worth 4 million yuan (600,000 U.S. dollars), they belonged to one of two groups arrested by Kenyan police on Nov. 29, 2014, the ministry said in a statement released Monday.

Another 36 suspects in the other group were repatriated in April and have been formally arrested. They allegedly swindled more than 26 million yuan out of mainland residents by pretending to be members of Beijing and Shanghai police.

The two groups were believed to have colluded in fraud activities and mainland police hope to find out all the facts now that they have all suspects in custody.

The mainland police have kept their Taiwan counterparts informed of all developments.