Fresh Russian military equipment has been seen coming into Ukraine from Russia in the past 24 hours, Ukrainian military spokesperson said.
The equipment reportedly included three Grad missile system.
Russian drones had violated Ukrainian air space on 10 occasions, the spokesperson said.
Ukrainian rebels said earlier they were receiving new armoured vehicles and fighters trained in Russia. A separatist leader said in a video statement they plan to launch a major counter-offensive against government forces.
Russia has previously denied arming the rebels.
More top news
Very windy with gales possible
Strong performance from world number 100 meant Great Britain very nearly dominated day one of the competition.
As a promotion Black Friday is flawed. While it whips up demand and redistributes it the event doesn't obviously generate additional sales.