Lamu Senator Anwar Loitiptip is fighting for his life at Aga Khan Hospital after an attack by unknown people.
The incident is reported to have taken place in Nairobi.
Kasarani Police Commander told Kenyans.co.ke that one person was arrested in connection to the attack.
The attack is said to have happened over the weekend.
Gory photos that could not be published showed that Anwar suffered deep cuts to his head.
The wounds have since been stitched and the legislator's condition is being monitored by medics.
Saumu Mbuvi, Governor Mike Sonko's daughter who was with the senator at the time, told police that she had been with the senator at a club that Saturday night watching the UEFA Champions League finals and had excused herself to the washrooms when the trouble began.
While at the washrooms, a man confronted her pulling her blouse that he allegedly tore.
She told police she screamed in the confrontation in the toilet and an unknown person hurled a stone towards her.
Her attacker let her off and got into another room near the toilet. By then, the Senator who was apparently alerted of the incident and rushed there to save her.
According to Saumu, Loitiptip told off the man declaring the governor’s daughter was his girlfriend.
“The man came out of the room and pleaded for forgiveness and I told Anwar to let him go,” she said.
And as the senator and Saumu walked to the parking lot at about 2.40 am where their car was parked, they were attacked by about nine men who were in the company of the brown man who had confronted her in the toilet.
She said the gang bludgeoned the senator with clubs. Saumu told police in her statement she tried to cover Loitiptip from the beating using her hand and she sustained injuries on her right hand.
The gang escaped from the site leaving a bleeding senator and the woman on the ground.