"The criminal was neutralised in an exchange of fire. A gun and a ready-for-use improvised explosive device were found at the scene of the shootout. According to reports, the neutralised bandit intended to carry out a terrorist attack", the NAC said.
There were no victims in the incident, it added.
According to the NAC, the officers attempted to stop a car with the armed bandit on a highway in the suburbs of Ufa on Saturday at about 14:00 GMT. When demanded to lay down his arms and surrender to the authorities, the bandit opened fire.
On 20 March, the Russian Federal Security Service said it had stopped a secret cell of the Daesh* terrorist group that had collected some $26,000 for Daesh militants.
The special operation was carried out jointly with the financial watchdog in Crimea, Komi, and Rostov region.
*Daesh (aka Islamic State/ISIS/ISIL) is a terror group banned in Russia