A boy and a girl died presumably from fragmentation wounds in the city of Slovyansk, eastern Ukraine, on Tuesday, Donetsk region administration spokesman Illia Suzdalev has said.

"Two children, a boy and a girl, aged 12 and 6 years old, have died. Forensic experts have tentatively concluded that their death was caused by fragmentation wounds," Suzdalev told the 112 Ukraine television station on Tuesday, declining to provide further details.