Africa's youngest billionaire, snatched a week ago off the street outside a luxury hotel in Tanzania, has returned home unharmed after being released by his kidnappers, police said Saturday.

Mohammed Dewji, 43-year-old CEO of the METL Group family conglomerate, was seized as he arrived for a morning workout in Tanzania's commercial capital Dar es Salaam last week. Forbes estimates his net worth as $1.5 billion, making him Africa's 17th richest man and its youngest billionaire.

Lazaro Mambosasa, Dar es Salaam's police commander, said that Dewji was abandoned by his kidnappers in the city's Gymkhana area at 2:30 a.m. local time.