At least 1,500 Russian troops and convoys of military hardware entered Ukraine over the weekend, the Ukrainian military said on Monday.
“One thousand five hundred Russian soldiers and 300 pieces of military equipment, including Grad missile systems, crossed the Ukraine-Russia border on February 7 and 8,” Ukraine military spokesman Andriy Lysensko told journalists.
Around 170 vehicles, including trucks, petrol tankers and cars, also crossed the border, he said.
Ukraine and the West accuse Moscow of supplying troops and equipment to pro-Russian separatists battling the Kiev military in the east of the country, something Russia denies.