The Kenyan authorities has on Friday arrested the governor of Nairobi county, Mike Sonko, on suspicion of involvement in a multi-million-dollar corruption scandal.

The director of public prosecutions who ordered the arrest said he had enough evidence to prosecute Mr Sonko and several other county officials for crimes including money laundering and unlawful acquisition of public property.

He said the investigation had been challenging because of repeated attempts by the accused to obstruct it.

Mr Sonko has previously described the allegation as a witch-hunt carried out for political reasons.

He is a controversial politician who has spent time in jail and has denied numerous allegations of illegal activities, including drug trafficking.