Business operations in Nairobi's central business district (CBD) are staring at disruption after police began clashing with hundreds of protesters demanding justice for slain teacher and blogger Albert Ojwang.

Protesters, armed with placards and Kenyan flags, thronged the CBD with officers closely monitoring the procession following last week's chaotic scenes during similar demonstrations.

Tensions escalated when police lobbed teargas canisters at the crowd gathered along Kimathi Street near the Nation Media offices, where they had paused to hold prayers before proceeding.

The unexpected assault prompted demonstrators to scatter in various directions, with some regrouping and charging toward the Central Police Station, Nairobi,  while chanting freedom songs in honour of Ojwang.