Nigeria has deported 102 foreign nationals, including 60 Chinese and 39 people from the Philippines, who were convicted of “cyber-terrorism and internet fraud”, according to the country’s anticorruption agency.

The announcement by Nigeria’s Economic and Financial Crimes Commission (EFCC) on Thursday comes as the country steps up a crackdown on online scam operations, which lured victims through online romances to hand over cash for fake cryptocurrency investments.

EFCC spokesman Dele Oyewale later told the AFP news agency that another group of 39 Filipinos, 10 Chinese and two people from Kazakhstan had also been deported since August 15.

More deportations were also scheduled in the coming days, he added.

The anticorruption agency released pictures of Asian men wearing surgical face masks, lined up at airport check-in counters.

The deportees were among 792 suspected cybercriminals arrested in a single operation in the affluent Victoria Island area of Lagos in December. At least 192 of those arrested were foreign nationals, of whom 148 were Chinese, the EFCC said.

Nigeria, Africa’s most populous country, has a reputation for internet fraudsters known in local slang as “Yahoo Boys”, and the EFCC has busted several hideouts where young crime suspects learn online scamming skills.

According to the agency, foreign gangs recruit Nigerian accomplices to find victims online through phishing scams. The attackers typically try to deceive victims into transferring money or revealing sensitive information such as passwords to accounts.

The scams target mostly Americans, Canadians, Mexicans and Europeans, the EFCC said.

Experts say the fraudulent investment schemes used by cyber-scammers have become increasingly sophisticated and dynamic as they leverage the latest technologies and digital tools.

The schemes ultimately leave victims – many of whom invest their savings, business capital, and borrowed money – unable to do anything but watch their hard-earned money disappear.

Experts also warn that foreign “cybercrime syndicates” have set up shop in Nigeria to exploit its weak cybersecurity systems.