Ukraine's new president declared Sunday a day of mourning and vowed to punish those responsible after pro-Russia separatists shot down a Ukrainian military transport plane, killing all 49 crew and troops aboard.
It was a bitter setback for the Ukrainian forces — the deadliest single incident yet in their escalating battle against an armed insurgency that the government, backed by the U.S., insists is supported by Russia.
The downing of the plane drew condemnation and concern from the White House, European leaders and U.N. chief Ban Ki-moon. Analysts said it could bring a renewed emphasis on increasing sanctions against Russia.
"(This) will refocus attention on the fact that Russia does not seem to be doing very much to moderate the insurgency (or) the cross-border resupply of separatists," said Timothy Ash, an analyst at Standard Bank PLC. "I would expect the focus to return to sanctions next week."
Ukrainian President Petro Poroshenko spoke firmly to glum-faced security officials at a televised emergency meeting Saturday, scolding the head of the country's SBU security service for "omissions" in measures to protect military aircraft