At least one suspect was shot and killed in a confrontation between police and suspected thieves at the Del Monte farm in Muranga County.
The mob also set on blaze a security van that was being used for patrols on the farm, police said.
A team of police officers accompanying private security guards manning the expansive farm said they on August 12 encountered a mob of about 150 who were targeting pineapples therein.
The group attacked the security team with stones, slashers and machetes, police said.
This prompted one police officer in the team to try to jump out the vehicle for protection.
According to police, in the process one of the officers slipped and fell on the ground in the farm as the vehicle they were using came under attack.
The mob charged towards him and tried to attack him with machetes and slashers, prompting his colleagues to shoot to the air as they rescued him.
The rowdy thieves retreated and charged before they cornered the G4S vehicle, which they set on fire.
They then, according to police targeted the police prompting the team to shoot in defence.
The officers asked for reinforcement from Ngati police station which arrived in time prompting the larger group to escape.
It was then that one Harison Kibandi Marubu, 34 was fatally injured, police said.