Chernihiv mayor: City 'completely destroyed,' over 200 civilians killed.

Ukraine's military intelligence urged civilians to take air raid alerts seriously and "be ready to react."

This is despite the group's public map showing a Russian advance of 14 square kilometers (about 5.4 square miles) in May, due to the delay in publicly acknowledging advances by the Ukrainian military amid security concerns, according to DeepState.

"The president has tasked us with trying to end this war as quickly as possible. I can confirm that this is indeed his goal — to bring hostilities to an end as soon as possible, preferably before winter," President's Office Head Kyrylo Budanov told the Kyiv Independent.

The vessel, Tagor, has been transporting Russian crude oil and petroleum products and is sanctioned by the EU, the United Kingdom, and Ukraine.

"The evidence identified at the scene is structurally and functionally identical to those recovered... in previous incidents involving Geran-2 type unmanned aerial vehicles," the country's Defense Ministry said.

Russia launched 265 Shahed-type attack drones against Ukraine overnight, the Air Force said. Ukrainian air defenses shot down 228 of them, while 27 drones struck targets at 18 locations.

"Every Arc7 tanker serviced in Denmark could help prolong Russian Arctic LNG exports for years," Alexander Kirk, a sanctions campaigner at Urgewald, said.

The number includes 1,560 casualties that Russian forces suffered over the past day.

"This is a ticking time bomb and I think everybody in shipping knows it," shipping executive Alexander Saverys told the Financial Times.

With Ukrainian forces regaining the battlefield initiative, Kyiv has until winter to effectively negotiate with Moscow, Zelensky told CBS News in a May 31 interview.