Kibra protestors have taken to the streets of Olympic carrying stones as they await ODM Leader Raila Odinga's mass action.
Some carried packed stones on their heads as they go on the streets.
Many shops were locked in the area as some youths were heard shouting.
They walked in large groups as they sang, while others threw stones.
There was a temporary standoff between police and youth as some youth were seen pelting stones at police cars.
But the police retaliated by lobbing tear gas at the youths who had now disappeared into the alleys and shops.
Police were earlier seen collecting car tyres on the roadside in Ayanyi, Kibra.