News of the threats in Nyeri County came days after a student was arrested for being found with bomb-like objects near the Dedan Kimathi University of Technology.
The student, Bruce Ndegwa, who has been remanded for seven days had unidentified electronic devices strapped to his stomach, waist and chest.
This has since been followed by reports of terror threats in the area as received by police.
Police sources said the first report of the threats was received on Saturday, the claim being that several unnamed churches would be ambushed.
As a result, police officers were deployed in large numbers to places of worship around the county.
After this, surveillance and police presence once again had to be increased on Monday following information about an imminent attack on the Kigango college.
Dozens of patrol units were deployed around the institution.
The county commissioner said no arrests had been made but that they were following several leads.
On the other hand, Laikipia County police have heightened patrols following reports of a terror threat on an unspecified location.
County Commissioner Onesmus Musyoki confirmed this but declined to give details.
“There have been threats. Some are rumours but we are taking them very seriously. Investigations are ongoing into the information which we have received,” Mr Musyoki said.