A Ukrainian drone hit a Tamanneftegaz fuel tank in the Port of Taman, Russia, at about 2:30 a.m. local time Wednesday, Kirill Fedorov, a pro-Russian blogger, said on his Telegram channel. The Port of Taman is in the Black Sea near the Kerch Strait.

The fire could be seen in a video circulating online.

Local authorities confirmed the fire, which "has been assigned the highest rank," the governor of the region said. A tank with petroleum products was hit by the drone and is burning, the governor said. No injuries were reported and there was no threat to residents, he added on his Telegram channel.

-ABC News' Tanya Stukalova

All drones that were used by Russians to attack Kyiv early Wednesday morning local time were shot down by Ukrainian air defense systems, the Kyiv City Military Administration said on Telegram.

There were no reported injuries or casualties, the military administration said.

This was the third attack on Kyiv in six days, the administration added.

-ABC News' Natalya Kushnir

Explosions were reported in Kyiv around 1:00 a.m. Wednesday local time, according to Suspilne, the Ukrainian public broadcaster.

The Ukrainian Air Defense Forces were activated in response, the Kyiv City Military Administration reported.

S-300 missiles belonging to Ukrainian Armed Forces were hit in Zaporizhzhia, the spokesman of the Odesa Regional Military Administration, Serhiy Bratchuk, said on Telegram.

Reports of damage, and number of people injured or killed were not immediately available.

-ABC News' Ellie Kaufman and Max Uzol

A 26-year-old U.S. Marine Corps veteran was killed in a mortar strike last month in Ukraine while working to evacuate civilians, his family confirmed to ABC News this week.

Cooper Andrews died on April 19 in the Bakhmut area, his cousin Willow Pastard, who is speaking on his family's behalf, told ABC News.

The State Department announced Monday that an American citizen died in Ukraine, though did not provide more details or an identity "out of respect for the family's privacy during this difficult time."

"We are in touch with the family and providing all possible consular assistance," a spokesperson for the agency said in a statement.

At least nine deaths of U.S. citizens who have volunteered to fight in Ukraine have been officially reported since the war began last year, according to the State Department.

-ABC News' Shannon Crawford

The U.S. estimates that Russia has suffered over 100,000 casualties, including over 20,000 killed in action, since it stepped up its winter offensive in December, a White House National Security Council told ABC News.

Half of the 20,000 killed in action were members of the Russian-backed private military Wagner Group, according to White House spokesman John Kirby. The majority of Wagner fighters killed were allegedly ex-convicts, according to Kirby.

Kirby said that the data came from "some downgraded intelligence" that the U.S. has been able to collect. He was unable to provide data on deaths of Ukrainian fighters.

Kirby had earlier told reporters that the Russian casualties took place from battles in Bakhmut since December, however, the National Security Council member said the data encompasses all winter battles.

Many, but not all, of these Russians were injured or killed in the Bakhmut fighting, according to the official.

Kirby emphasized that the U.S. thinks Bakhmut holds "very little strategic value for Russia" and if captured by Russia, it "would absolutely not alter the course of the war in Russia’s favor."

-ABC News' Ben Gittleson