A Ukrainian drone strike has killed at least 13 people and injured 39 others in Nizhnekamsk, a city in the Tatarstan region deep inside Russia, local authorities said Monday, marking the deadliest attack to hit the country in more than two years.

Russia's Supreme Court barred the Yabloko party from participating in September's parliamentary elections, citing alleged violations of election campaigning rules, according to a ruling published Aug. 10.