The day after his 29th birthday in May, Olalekan Jacob Ponle posted a picture on his Instagram standing next to a bright yellow Lamborghini in Dubai.

"Stop letting people make you feel guilty for the wealth you've acquired," he admonished, wearing designer jewellery and Gucci clothes from head to toe.

A month later, the Nigerian, who goes by the name "mrwoodbery" on Instagram, was arrested by Dubai Police for alleged money laundering and cyber fraud.

The most famous of the dozen Africans nabbed in the dramatic operation was 37-year-old Ramon Olorunwa Abbas, "hushpuppi" or just "hush" as he was known by his 2.4 million Instagram followers.

Police in the emirate say they recovered $40m (£32m) in cash, 13 luxury cars worth $6.8m, 21 computers, 47 smartphones and the addresses of nearly two million alleged victims.

By Larry Madowo