One person was killed and seven others injured after Uhuru and Muthurwa market traders clashed in Narok town.
The clash was as a result of demonstrations at Uhuru market over the alleged demolition of kiosks by the Narok County government.
Among those injured was a police officer who was trying to calm the demonstrators.
Traders report that the demolitions were carried out on between 2am and 4am on Sunday.
Uhuru market traders chased away traders operating from other markets such as Muthurwa, ODM and Kandas.
The enraged Uhuru market traders then set ablaze Muthurwa Market in Majengo estate, prompting police officers on scene to intervene and fire in the air to disperse them.
Deputy county commissioner Ronald Mwiwawi has resolved to sort out the issue.
Twelve suspects were arrested after the demos broke out.
The suspects are being held at Narok Police station.