There is an ongoing threat of terrorism in Russia. Terrorist attacks have occurred in recent years, including in Moscow and St. Petersburg.
On 27 December 2017, a bomb exploded in a supermarket in St Petersburg, injuring thirteen people.
On 3 April 2017, an explosion occurred on a train carriage travelling between Sennaya Ploshchad and Tekhnologichesky Institut metro stations in central St Petersburg. At least 9 people were killed and more than 20 injured.