Nigeria has deported dozens of foreigners, including 50 Chinese nationals, in a major crackdown over the last week on one of the "largest foreign-led cybercrime syndicates", the country's anti-graft agency has said.

"This brings the total repatriated convicted foreign nationals to 102 in the ongoing exercise," it said, adding they had been found guilty of "cyberterrorism and internet fraud".

They are among the 192 foreigners arrested during a sting operation in Lagos last Friday.

Nigeria is notorious for internet fraud and romance scamming is rife. Cybercrime cases were amongst the most prevalent offences in Nigeria last year, according to the Economic and Financial Crime Commission (EFCC).

In recent years, the EFCC has successfully busted several hideouts where young cybercriminals, locally known as "Yahoo Boys", learn their scamming skills.