A military helicopter has been shot down in eastern Ukraine, killing at least 10 people.
The incident is said to have occurred near Slovyansk, with some reports putting the loss of life at 14. A Ukrainian general was allegedly among the dead.
Kyiv is blaming pro-Russian rebels for the attack, with the country’s outgoing interim president claiming they used a Russian-made anti-aircraft system.
The helicopter was hit during heavy fighting as Ukrainian troops launched fresh operations in the area.
It has also emerged that four international observers from the Organisation for Security and Cooperation in Europe are being held captive by pro-Russian militiamen. According to Russian media reports, those being detained could soon be released.
Since winning the national vote, President-elect Petro Poroshenko has vowed to increase efforts to reassert control in the country’s troubled east.
Shelling has been reported in the town of Slovyansk, injuring at least 10 people. Civilians are now said to be fleeing the area.
On Monday rebels claimed they lost 100 lives after an attempt to seize the airport in Donetsk was repulsed by government forces.