The head of Moldova’s breakaway region Transnistria has urged residents to burn firewood for heating and warned that blackouts cannot be avoided, after Moscow stopped supplying gas via Ukraine.

More than 51,000 households were left without gas and 1,500 apartment buildings had no winter heat in Moldova's pro-Russian separatist enclave, authorities said on Monday, as Moldova and Russia traded blame for an escalating energy crisis.

More than 51,000 households were left without gas and 1,500 buildings had no heating in Moldova’s separatist region Transdniestria, authorities told Reuters. The development comes after Ukraine had refused to transit Russian gas through its pipelines to Europe.