Two suspected thugs were shot dead at Kariobangi South and three guns recovered.
One of the three, who were headed on a robbery mission around midnight, was arrested by the police who ambushed them.
Buruburu DCI chief Jeremiah Ikiao said a Glock pistol stolen from a civilian firearm holder in 2014 was recovered from the gang.
A second pistol, a home-made gun capable of firing, was also seized. A third firearm is still being examined.
On Tuesday last week, a suspected thug was shot dead and a pistol recovered in a botched robbery in Nairobi.
His accomplice fled the scene in Kwa Nguruwe in Kayole.
Nairobi DCI boss Ireri Kamwende said the two were riding on a stolen motorcycle.
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