Ukraine’s military says it went to the aid of soldiers besieged in Donetsk airport
Observers in eastern Ukraine have warned of a serious deterioration in security as fighting intensifies in the Donetsk and Luhansk regions.
The Organisation for Security and Co-operation in Europe (OSCE) told the BBC that fighting around Donetsk airport was spreading further into the city.
A spokesman said that their greatest concern was for civilians, especially children.
Ukrainian forces and pro-Russian rebels both say they control the airport.