A serviceman shouts with an under-barrel grenade launcher in a position of Ukrainian forces near Avdiivka, Donetsk region on August 23, 2015. Ukrainian President Petro Poroshenko accused Russia of this week sending three military convoys over the border into the separatist-controlled east with a total of up to 500 tanks, 400 artillery systems and up to 950 military armoured vehicles to pro-Russian rebels, although he did not specify the time period for these deliveries. AFP PHOTO/ ANATOLII STEPANOV        (Photo credit should read ANATOLII STEPANOV/AFP/Getty Images)