The Ukrainian military says pro-Russian rebels have attacked its forces again at Donetsk airport despite a ceasefire deal earlier in the day, reports GHN based on BBC.
The statement on Facebook said rebel shelling shattered the calm soon after both sides had ended their meeting.
Earlier the rebels reported a truce at the bitterly contested airport. And a ceasefire was agreed in nearby Luhansk region, European observers said.
Fighting has raged at the airport for three days. The rebels hold the city.
Ukraine says Russian special forces were involved in the latest Donetsk fighting, helping the separatists, who control a large swathe of eastern Ukraine.
The Kremlin has repeatedly denied Ukrainian and Western accusations that it has sent tanks and troops to the war-torn region to help the rebels.
"There was a lull at Donetsk airport during the day," the Ukrainian military statement said, but after the ceasefire talks "the terrorists resumed attacks on the [airport] terminals".
The statement was echoed by Russia's Interfax news agency, which reported explosions on the northern outskirts of Donetsk on Tuesday evening.
A ceasefire deal agreed on 5 September has been violated repeatedly.
A Russian general attended the Luhansk talks, chaired by OSCE observers.