Ukraine is blocking international investigators from accessing the crash site of Malaysia Airlines flight MH17, charges Russia's ambassador to the United Nations in comments to Russian media, according to dpa. "We're worried, that Kiev authorities want to destroy evidence that would reveal their role in this catastrophe," Vitaly Churkin, who noted that Ukrainian government plans for a ceasefire around the crash site had been violated almost instantly with new offensives against pro-Russian separatists.