The Ukrainian forces involved in the antiterrorist operation in the southeastern part of the country have not used any aircraft since Monday because of an ongoing investigation into the crash of an Antonov An-26 plane, the antiterrorist operation press center reported on Tuesday.

"Because of an investigation into the situation involving the crash of an An-26 military transport plane of the Ukrainian Air Force in the Luhansk region on July 14, flights by the antiterrorist operation forces have been suspended until further notice. The antiterrorist operation aircraft have been grounded at their permanent bases since July 14, 2014," the press center said.

Meanwhile, the Russian-led insurgents claimed that the Ukrainian Air Force delivered an airstrike upon the town of Snizhne, which killed 10 people and partially destroyed a residential building.

The An-26 plane was transporting non-military cargo, i.e. drinking water and food for antiterrorist operation personnel deployed at roadblocks at some sections of Ukraine's border, it said.

A search and rescue operation to find the 6 crewmembers of the An-26 is continuing.