Several explosions reported in Mykolaiv.

The railway operator initially reported that the passenger train's driver suffered a leg injury and four passengers required medical attention. The crew of the electric locomotive was unharmed.

The acclaimed journalist was reportedly on an editorial assignment in Vienna with his colleague Yaroslav Bondarenko when he was detained by Austrian authorities.

"We certainly are capable," Zelensky said about striking Russian data centers. "We always respond in kind. Regarding data centers, as you all know, they have been and still are striking our data centers."

"Meetings are expected to take place over two days... we are counting on a European team to join our negotiating group," President Volodymyr Zelensky said.

Initial reports raised concerns that 28-year-old Darya Shipilova, who worked at the Anti-Plague Institute, might have died of pneumonic plague after a laboratory accident.

"Russia comes to the Ukrainian land with death," Donetsk Governor Vadym Filashkin said.

The drop in voltage temporarily halted Kyiv Metro train services and escalator operations, the Kyiv City State Administration (KMDA) said. Other parts of the capital's public transport network were also affected.

At 10:00 a.m. local time, Ukraine’s biggest private energy firm DTEK announced emergency energy shutdowns in Brovary, Buchanskyi, Vyshgorod, and Boryspil districts of the capital.

"The government looks forward to the smooth resolution of all pending issues between the two countries and will continue consultations with the Ukrainian side to this end," the South Korean Foreign Ministry said in a press release.

"If this winter in Ukraine is as difficult as the whole world expects, we are ready to receive as many people as need safety," Moldovan President Maia Sandu said at the Moldova Security Forum in Chisinau on Oct. 8.

Videos and images from local residents, shared by Ukrainian monitoring channels, show explosions, fire, and smoke rising from the area surrounding the oil refinery.

An investigation on a mass Russian drone incursion into Polish air space on Sept. 9 concluded on Oct. 8.