An explosion during the operation injured two special police officers, while a third suspect was detained alive, reports said.
"Law enforcement officers stopped a car, two suspects resisted arrest and were liquidated on the spot. Explosives were found in the car," TASS state news agency quoted a source as saying.
The special operation is reportedly taking place in a residential area of Nizhny Novgorod, an industrial city of more than 1 million on the banks of the Volga River, around 400 kilometres east of Moscow.
There was no immediate official confirmation of the reports. Such special operations are frequent in Russia's volatile North Caucasus but are rare in the central region where most Russians live.
A law enforcement source quoted by TASS named those killed as "members of illegal armed groups," a term also used by officials to describe Islamist insurgents in the North Caucasus.
Two special police officers were wounded in an explosion during the operation, TASS reported, citing a local police source.
A third suspect was detained alive, Interfax news agency said, quoting a regional law enforcement official.
A Rossiya 24 state television correspondent reported that details of the incident would only be released on Monday.
The regional branch of the FSB security service told Interfax news agency that "until urgent investigative steps are finished, we will not comment. Later we plan an official press release."
Local media posted photographs from social networking sites apparently showing two bodies lying on the ground close to a car with doors open, as vehicles and security officers block the nearby road in a suburb called Tsvety.
Disclaimer: No Business Standard Journalist was involved in creation of this content
You’ve reached your limit of {{free_limit}} free articles this month.
Subscribe now for unlimited access.
Already subscribed? Log in
Subscribe to read the full story →
Smart Quarterly
₹900
3 Months
₹300/Month
Smart Essential
₹2,700
1 Year
₹225/Month
Super Saver
₹3,900
2 Years
₹162/Month
Renews automatically, cancel anytime
Here’s what’s included in our digital subscription plans
Exclusive premium stories online
Over 30 premium stories daily, handpicked by our editors


Complimentary Access to The New York Times
News, Games, Cooking, Audio, Wirecutter & The Athletic
Business Standard Epaper
Digital replica of our daily newspaper — with options to read, save, and share


Curated Newsletters
Insights on markets, finance, politics, tech, and more delivered to your inbox
Market Analysis & Investment Insights
In-depth market analysis & insights with access to The Smart Investor


Archives
Repository of articles and publications dating back to 1997
Ad-free Reading
Uninterrupted reading experience with no advertisements


Seamless Access Across All Devices
Access Business Standard across devices — mobile, tablet, or PC, via web or app
