Twelve miners have been killed by a Russian drone strike in eastern Ukraine, as confirmed by DTEK, the country's largest private energy firm.

The attack occurred as a bus carrying workers was targeted in the Dnipropetrovsk region on Sunday, leaving at least 15 individuals injured according to state emergency services.

In a series of assaults, two additional casualties were reported along with nine injuries from separate Russian attacks, including a drone strike that hit a maternity hospital in Zaporizhzhia.

This escalation in violence comes despite Russia having previously committed to refraining from attacks on population centers and energy infrastructure during the extreme cold weather conditions.

On the day of the bus attack, Moscow had already confirmed a pause in aerial assaults on urban settlements, purportedly to facilitate peace negotiations expected to occur this week.

Ivan Fedorov, head of the Zaporizhzhia region, condemned the attack on the maternity facility, describing it as concrete evidence of a war waged against life.

Further skirmishes related to ongoing conflicts saw casualties in other regions, highlighting the complexity and ongoing violence in the area, while Ukrainian officials continued to express concerns over civil safety amidst ongoing military operations.