俄罗斯敦促乌克兰参加停火谈判
An "immediate ceasefire" in Ukraine must be the priority for key negotiations taking place on Monday, Russia's foreign minister has said.
俄罗斯外交部长称，周一与乌克兰举行的会谈中，“立即停火”必须优先考虑。
Ukrainian troops "must leave positions from which they can harm the civilian population", Sergei Lavrov said.
Ukrainian and Russian officials are due to hold talks with separatist rebels and international monitors in the Belarusian capital, Minsk.
Some 2,600 people have died in eastern Ukraine since fighting began in April.
The conflict broke out after Russia's annexation（合并） of Ukraine's southern Crimea peninsula in March.
Last week's first direct talks between Russian President Vladimir Putin and his Ukrainian counterpart, Petro Poroshenko, did not lead to any major breakthrough.
The separatists have been gaining ground on Ukrainian forces in recent days, in both the Luhansk and Donetsk regions, and further south around the port of Mariupol.
Ukrainian military spokesman Leonid Matyukhin said troops were battling a Russian tank division in the city of Luhansk.
Overnight reports said separatists had taken control of the airport there.