Outrage over the death of a Kenyan teacher and activist in police custody sparked protests in the capital Nairobi this week after doctors refuted a police claim that he had died in his cell from a self-inflicted head injury.

Kenyan police on Thursday fired teargas to disperse dozens of protesters in Nairobi who were demonstrating against the death of a blogger in police custody last week, Reuters TV footage showed.

Authorities in Kenya have arrested a senior police officer responsible for the cell where a blogger died, leading to widespread protests in the capital, Nairobi, that left dozens injured.