ALEXEI NIKOLSKY via Getty ImagesRussia's President Vladimir Putin chairs a Security Council meeting in the Kremlin in Moscow, on July 1, 2014. Ukrainian forces pressed on with their assault on pro-Russian insurgents after Kiev's Western-backed leader brushed off European efforts to save a tenuous truce, prompting Russia to raise alarm over the 'swiftly deteriorating' situation. Putin said yesterday Ukrainian President Petro Poroshenko was assuming responsibility for future casualties and gathered his top security aides to discuss the 'swiftly deteriorating' situation in his western neighbour. AFP PHOTO/ RIA-NOVOSTI/ POOL /ALEXEI NIKOLSKY (Photo credit should read ALEXEI NIKOLSKY/AFP/Getty Images)