Police in Magarini are investigating the murder of two watchmen manning petrol stations.
In the first incident, Alfred Kashirihiri Gumbo, 68, was murdered and his body dumped near a hotel.
Sabaki sub-location assistant chief Rachael Malindi yesterday said Gumbo appeared to have been strangled.
In the second incident, Safari Menza was found dead on Tuesday.
Gongoni chief Bashehe Hussein Bashehe said Menza seemed to have been hit on the head with a blunt object.
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The killers stole Sh10,000 from the petrol station he was manning. Mr Basheshe urged business people to install CCTV cameras at their premises to help identify criminals.
Ms Malindi asked residents to share with the police any information that could lead to the arrest of the murderers. She urged locals to be calm.