Ukraine angry at 'Russian tanks' for separatists
13 June 2014 Last updated at 03:23 BST
Authorities in Ukraine have accused separatist rebels of using Russian tanks and other armour in fighting in the east of the country.
Moscow has denied the report, describing it as "another fake piece of information".
Meanwhile in Donetsk, three people were injured when a vehicle belonging to a separatist leader was blown up.
Alpa Patel reports.