Starehe MP Charles Njagua alias Jaguar dislocated his ankle during a crush at Marikiti/Wakulima market where protests took place on Wednesday evening.
Njagua was treated at Karen Hospital and discharged.
He said that trouble started as county officials moved in on hawkers who had sought refuge at the market.
A standoff ensued after they arrested a trader at the market after mistaking him for a hawker.
“The county operators had been looking for hawkers who went to hide in the market. Their arrest of the innocent man led to a deadly confrontation,” Jaguar said.
He added that the officers harmed the person, intensifying the row and causing running battles.
The officers got overpowered so they called regular police and the General Service Unit for reinforcement.
“I came to the rescue of the traders and tried to talk to the officers but little did I know that they had called for reinforcement. They threw tear gas canisters, forcing the people to scurry for safety," the MP said.
“It was during the commotion that there was a stampede."
Jaguar said the protest was also motivated by the arrest of five of the market's officials.
The chairman was apprehended yesterday after going to check on his colleagues who had been arrested.