KYIV, Ukraine (AP) — Ukraine on Sunday launched a wave of strikes against Russia’s oil export infrastructure, hitting a key loading port on the Baltic Sea and two tankers that Ukraine alleges were illegally used to transport Russian crude. A nighttime drone strike sparked a blaze at Russia’s largest oil exporting port on the Baltic Sea, according to Russian regional Gov. Alexander Drozdenko. The port of Primorsk, operated by Russia’s state oil firm Transneft, is capable of handling hundreds of thousands of barrels per day. The port, which was targeted multiple times in March, lies over 1,000 kilometers (620 miles) from Ukraine, between the Russian-Finnish border and Russia’s second-largest city of St. Petersburg. Local Gov. Drozdenko said that the drone strike did not cause an oil spill, but gave no immediate further comment regarding casualties or damage. Ukraine did not immediately comment on the attack on Primorsk.…