What to know

• Ukrainian drones hit energy and military sites in Saint Petersburg early Wednesday morning as officials gathered for a flagship economic forum in the city, Russian and Ukrainian authorities said.S1
• Ukrainian long-range drones hit an oil terminal in the Russian city of St Petersburg on June 3, setting the facility ablaze. It came hours before Vladimir Putin's showcase economic forum got under way in the city, apparently an attempt to embarrass the Kremlin...S2
• Ukraine has been stepping up long-range strikes as the war grinds on, with Russia's northerly second city now hit. The latest attack on Saint Petersburg takes place as an event long known as "Russia's Davos" kicks off.S3