Russia on Friday dismissed as unobjective and politically motivated a United Nations report warning of an "alarming deterioration" of human rights in Kremlin-backed separatist regions of eastern Ukraine.

"The complete lack of objectivity, blatant discrepancies and double standards leave no doubts that (the report's) authors were performing a political put-up job aimed at clearing the name of the self-declared authorities in Kiev," the Russian foreign ministry said in a statement.