Chaos erupted Monday at an ODM meeting in Migori Town, leaving several people injured.
Journalists were among scores of people injured in the ensuing melee at the Migori Posta grounds.
Leaders, including Mombasa Governor Ali Hassan Joho, senators Anyang Nyong’o and James Orengo, and MPs Junet Mohamed and Joseph Kobado, were whisked away by their bodyguards soon after the disorder started.
Confusion started when Governor Okoth Obado arrived at the event accompanied by his bodyguards.
Upon seeing the governor, some people started throwing water bottles at him, prompting his bodyguards to shoot in the air.
Mr Joho and Mr Orengo had not addressed the crowd when the violence started.