Police will use maximum force against railway line vandals, Makueni county commissioner Mohammed Maalim has warned.
He said they have enhanced surveillance to ensure safety of property and travellers along the SGR.
"We want to warn every one against railway vandalism, we will use maximum force and you know the consequences," he told journalists.
He spoke at the Mtito Andei SGR station after a meeting with security officials.
"Securing SGR is no longer left to police only. We have the chiefs and their assistants and all other national government officers who are also required to ensure the railway line is not interfered with at their areas of administration," Maalim said.
He also said grazing along the railway line is also prohibited.
In May, there was outrage after President Uhuru Kenyatta said SGR vandals will be hanged.
He made the remarks after a section of the new line was damaged by unknown people in Mariakani.
Pictures showed a gap in a section of the guardrail, an incident that resulted in claims of sabotage.
Engineers scurried to carry out repairs before the launch and the four suspects who were later arrested will be charged with organised crime, DPP Keriako Tobiko said.