
The seven are among 34 people whom the Singapore Police Force (SPF) have issued arrest warrants for, according to The Straits Times.
They were identified as Tang Soon Fai, Kang Liang Yee, Tang Soon Wah, Hoe Ming Wei, Pang Han Ee, Bernard Goh and Yip Chee Hoe.
The remaining 27 are Singaporeans.
The SPF said the suspects were currently outside Singapore and that the force was working with their counterparts in other countries to track them down.
The 34 are said to be linked to 15 other suspects, including two Malaysians, who were charged in September over their alleged roles in the same syndicate.
The SPF said they had conducted a joint enforcement operation with Cambodian police on Sept 9 against an organised criminal group involved in a government officials impersonation scam targeting Singaporean victims.
The group was believed to be operating from a scam compound in Phnom Penh and was allegedly responsible for 438 cases involving losses of at least S$41 million.
Following the initial operation, 15 suspects, comprising 12 Singaporeans, two Malaysians and one Filipino, were arrested in Singapore and charged on Sept 11 and 12 with being members of a locally linked organised criminal group.
The SPF said that through further investigations and evidence gathered in Cambodia, the 34 being sought currently were identified as members of the same group, believed to have operated from the scam compound in Phnom Penh.
The force said it was working with Interpol to issue Red Notices against the suspects.
“The SPF will spare no effort to pursue criminals who base their operations locally or overseas and target Singapore,” it was quoted as saying.