Journalists wait outside the Director of Criminal Investigation headquarters, following the arrest of the head of the National Youth Service, Richard Ndubai, along with an unspecified number of officials over corruption in Nairobi, Kenya, on Monday. Photograph:  Baz Ratner/Reuters

Kenyan authorities have arrested more than 20 people, including senior officials, in a probe into the alleged theft of almost $100 million from a gove(...)