- Mama Ida Odinga, the wife to Azimio Presidential candidate Raila Odinga, was also present at the rally.
- In a statement, police say that action shall be taken on anyone found to have been responsible for the act.
National Police Service now says they have arrested a police officer believed to be behind the teargas explosion that prematurely ended the Azimio rally in Kisii County.
Azimio Presidential running mate Martha Karua and Mama Ida Odinga had attended a rally at Kisii Stadium when the teargas explosion threw the meeting into disarray.
In a statement, police say preliminary investigations have brought one person to book.
"NPS wishes to inform the public that preliminary investigation into the discharge of the teargas at the public meeting presided over by Martha Karua has established that the person responsible for the incident is a police officer."
The police officer is in custody assisting with investigations.
Karua had taken to the podium to address the rally held at Kisii Stadium when the explosion occurred.
She was forced to exit the podium and walk back to her car leaving the venue of the meeting without addressing supporters.
The crowd that had gathered at the Stadium was forced to scamper for safety throwing the meeting into disarray.
Preliminary reports show trouble started after supporters of Kisii Governor James Ongwae and Dagoretti MP Simba Arati clashed.