Security has been beefed up in the capital of Russia's Republic of Tatarstan, Kazan, amid official reports about possible terrorist threats.
Kazan authorities said on November 19 that the city's subway system, public spaces, streets, and industrial facilities were under increased police surveillance.
Special posters with instructions for Kazan residents regarding the security measures have been distributed.
The decision to increase security was made at a special session of the city administration on November 19.
On November 17, Tatarstan law enforcement officials said they had found significant amounts of handmade explosives in the city of Tuban Kama and the republic's Aleksei district.
Also on November 17, unknown arsonists attacked two Orthodox churches in Tatarstan's Yana Chishme district and the town of Chistai.
Based on reporting by Argumenti.ru and Interfax