Russia has blamed Ukrainian forces for Wednesday's crash of one of its military transport planes in the western region of Belgorod near the Ukrainian border. Kyiv is calling for an international investigation into the incident.
The Russian Defense Ministry said on Wednesday that Ukrainian forces shot down one of its military aircraft over Belgorod with missiles. It said everyone on board including 65 Ukrainian prisoners of war were dead.
The Russian state news agency said on Thursday that black boxes retrieved at the site of the crash will be analyzed to determine the cause of the crash.
Ukraine has neither confirmed or denied its involvement in the crash.
On Wednesday, President Volodymyr Zelenskyy blamed Moscow, saying Russians are messing with the lives of Ukrainian captives and the feelings of their relatives. He also called for an international investigation into the incident.
A Ukrainian media outlet reported on Thursday that a spokesperson at Ukraine's military intelligence agency said five bodies were sent to the local morgue in Belgorod and no human remains are visible on videos from the crash site. It also reported that he questioned Russia's claim that 65 Ukrainian POWs were on board the plane.
Meanwhile, a fire broke out at state-run Rosneft's oil refinery in the southern Russian region of Krasnodar from late Wednesday to early Thursday. Ukrainian media quoted sources as saying the Security Service of Ukraine conducted a drone operation overnight in an attempt to cut fuel supplies to the Russian forces.
Another fire broke out on Sunday at a facility of major Russian gas firm Novatek in Leningrad in northwestern Russia. Reports say that was also carried out by Ukrainian drones.