Two people were killed in Kasipul after violence broke out between supporters of two candidates at a rally in the constituency on Thursday afternoon.
Several people were also injured when supporters of ODM candidate Boyd Were confronted those of independent candidate Philip Aroko.
During the confrontation at the Opondo area in Central Kasipul Ward, two men were hacked to death using machetes, bringing back memories of past political violence within the constituency.
After the attacks, both politicians pointed fingers at each other for being responsible for the deaths and injuries.
County Police Commander Lawrence Koilem said the violence began when Mr Aroko was on his campaign trail.
He reported that the independent candidate found a crowd that was being addressed by ODM politicians.
"All of them were campaigning. Aroko found Boyd Were with some youths," the police boss said.
According to the police commander, gunshots rent the air when the two candidates met.
"One group decided to retaliate. Information going around was that someone had been shot," he said.
According to police, Mr Were rushed to report the matter as his supporters were fighting their opponents.
It led to the death of two men aged 26, spreading tension in the constituency.
Mr Koilem said he deployed a contingent of officers to the constituency to conduct night patrols to ease tension.
The county security committee, led by County Commissioner Ronald Fuba was planning to hold a meeting in Kasipul on Friday to address the rising cases of political violence. They are also investigating the case.
"We want to establish if he or she is a licensed gun holder," he said.
"We refuse to be broken by hatred or intimidation. In this moment of sorrow for Bruno and all who have suffered, we choose unity over division, courage over panic, and healing over anger," the independent candidate said.
He called for unity, saying voters should be kept safe.