 KIEV Ukraine accused Russia on Thursday of allowing separatist rebels to bring three tanks and other military vehicles across the border into the east of the country to fight the Ukrainian army. Image copyright Reuters Image caption Fighting has been raging in the east between the Ukrainian military and pro-Russian rebels 
 
 Ukrainian President Petro Poroshenko has told President Vladimir Putin that reports of Russian tanks moving into Ukrainian territory are unacceptable. 'Destroyed' 
 
 Mr Avakov said the tanks had crossed the border from Russia along with armoured personnel carriers and artillery pieces in the Dyakove area of Luhansk region, before moving into the neighbouring Donetsk region. It wants an investigation into allegations that Ukrainian forces used banned incendiary bombs against civilians. Russia has repeatedly denied providing military support to the rebels who have taken control of several towns and cities in east Ukraine and hope that Russia will annexe the region, as it did the Black Sea peninsula of Crimea in March. Foreign Minister Sergei Lavrov had earlier on Thursday repeated Moscow's view that the onus for ending violence lay with Ukraine because it has launched a military operation against the rebels.
– Three Russian tanks have made their way into eastern Ukraine by way of a rebel-controlled checkpoint, according to Ukraine's interior minister, the BBC reports. Arsen Avakov says the tanks, along with armored troop carriers, entered via the Luhansk region then rolled into the adjacent Donetsk region, where they made way to the town of Snizhne; a Reuters correspondent reports seeing three tanks there. Per Avakov, two have since moved to the town of Horlivka, where Ukrainian forces engaged them and a "fight is underway." Russia has not commented on Avakov's accusations that it let the tanks cross.