Nairobi Governor Mike Mbuvi Sonko was on Tuesday morning caught on camera assaulting a journalist.

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In a video going around social media, the governor is seen slapping a photojournalist identified as Collins Kweyu at the Ethics and Anti-corruption Commission headquarters where he pulled him behind and went through the gate.

Sonko had arrived at the Integrity Centre for questioning while journalists took his photos.

His supporters had stormed the EACC headquarters protesting the summoning of the county chief.

Police hurled teargas canisters to disperse the rioters who were mostly bodaboda operators.

However, Nairobi Country Director of communications Jacob Elkanah refuted claims that the governor had assaulted a journalist.

"No, those are anti-riot police officers," he responded as quoted by Kenyans.

"Sonko is a big name. His name was not built in a day or two. We have come from far and our aim is to serve the great people of Nairobi regardless of intimidation, harassment or whatsoever," he added.

On Monday Governor Sonko alleged that an EACC official was bent on frustrating him due to his effort of fighting land grabbing in the county.

He stated that he feared for his life but asserted that he would honour the EACC officials summon.

"I will be the one to decide where my statement will be recorded within the Integrity Centre for I know what they are capable of. Fellow Kenyans, be the judge. In the meantime the cartels must fall," he said.

Sonko is facing EACC for allegedly giving false information prior to his election as Nairobi governor in 2017.