Three pistols with 150 rounds of ammunition were at the weekend recovered from an abandoned house in Ruiru, Kiambu County.
Police said they had received intelligence reports on the presence of the weapons- a Berretta, Ceska and Flare pistols.
The flare pistol had a 12 gauge, police say.
The weapons seem to have been licensed to an unnamed individual before they were recovered on Saturday.
According to police, they were informed of the presence of the weapons there before they sought a warrant to search a house rented to a man who had left it in the custody of one Stephen Thungu.
Thungu left the house unattended for the past three months.
It was then that police were alerted and made the search and recovered the weapons.
Kiambu County head of DCI Amos Teben said they are investigating to establish if the weapons had been licensed and to who.
“The weapons seem to be licensed and we want to know more before we take action. And if they are not we will know,” said Teben.
The weapons were taken away for ballistic tests to establish if they had been used in any form of crimes.
There are more than 10,000 licensed gun owners in the country. The firearms licensing board on a regular basis sit to hear cases of misuse of guns by the owners.
Before one is issued with a license to own weapons, he or she goes through a rigorous process.