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
A terminally ill five-year-old boy led out the England team at Wembley with his "best friend" Jermain Defoe.
It comes as the country faces a major migrant crisis with more than 62,000 stranded including outside the port of Piraeus.
Regime change has unleashed sectarian and tribal urges and is tearing the country apart.