Activists and the father of a Kenyan civilian who was shot at close range by police during the country's latest protests over the alleged killing of a blogger in custody are demanding for accountability.

A Kenyan police officer has been arrested over the shooting of an unarmed civilian on Tuesday during protests in the capital Nairobi touched off by the death of a blogger in police custody, a police spokesperson said.

Security forces and hundreds of men armed with whips and clubs clashed with protesters in Kenya on Tuesday, with a police officer's shooting of an unarmed bystander triggering widespread anger. But they were quickly attacked by hundreds of men on motorbikes,