Police on Wednesday shot and killed four suspected thugs in Zimmerman and recovered an assortment of weapons and fake currency.
The four, according to the police, were armed and started firing at detectives who had responded after receiving a tip-off from members of the public.
Police recovered a ceska pistol, 10 rounds of ammunition, five spent cartridges and a homemade pistol.
Also recovered were a motorcycle, two mobile phones and Sh2.2 million fake currency notes.
Cases of fake money that has been impounded in the country have been on the increase, the recovery comes as detectives have nabbed several foreigners and Kenyans with millions of fake money.
Detectives say the fake money, in heaps of the said currencies, was used to fleece unsuspecting Kenyans of their cash.