Russia has blocked a Western-backed U.N. Security Council statement that would have condemned indiscriminate shelling in Ukraine's southeastern city of Mariupol that killed about 30 civilians and injured more than 90.

The blocked statement called for "an immediate de-escalation of violence," implementation of a September cease-fire and an "objective investigation" of Saturday's rocket-fire in Mariupol.

Russia's U.N. Mission said in statement there was no agreement because Britain insisted on condemnation of separatist "self-defense forces" who are backed by Russia. It said Western council members have never condemned any statements or actions by Ukraine's government.