Russian security services conducted an operation against armed affiliates of the self-proclaimed Islamic State (IS; formerly ISIS/ISIL) in the Siberian city of Tyumen on Friday night.
Armoured personnel carriers were deployed, with several areas of the city cordoned off.
Two terror suspects were killed during the operation, according to Russia's National Anti-terrorism Committee.
Officials said the militants were holed up in a private home as Russian special forces stormed the apartment and killed the terror suspects in return fire.
The Federal Security Service say the IS-linked militants were planning to carry out a terror attack in the local area.
No victims were reported among civilians during the operation.