Ukraine struck six Russian oil refineries and a defense plant over the span of a single week, according to a report by shelter.in.ua, with the damage estimated in the millions of dollars.

The strikes target processing infrastructure rather than production wells, extending a pattern of attacks aimed at Russia's downstream sector. Refineries hit in the campaign have repeatedly forced operators to halt units, conduct emergency repairs, and in some cases draw on state fuel reserves to stabilize domestic supply.

The report did not identify the individual refineries by name, their combined throughput capacity, or the specific dates of each strike. Nor did it specify which defense enterprise was hit or the extent of damage at that facility.

What the report does establish is scale: six processing sites struck within seven days, a tempo that compounds repair backlogs across Russia's refining system. Each damaged crude distillation unit or hydrotreater represents weeks to months of lost throughput, depending on spare-part availability under sanctions.

Previous strikes in the campaign have knocked out capacity at major complexes including facilities in the Volga and southern regions, driving temporary diesel and gasoline export restrictions from Moscow. The cumulative effect has been a slow erosion of exportable product volumes, even as crude output itself has remained largely intact.

The defense plant strike adds a second dimension, hitting military manufacturing alongside energy infrastructure.

For downstream watchers, the open questions are operational: which units are down, for how long, and how Russian operators will sequence repairs across multiple damaged sites simultaneously. Watch official Russian statements on fuel-export quotas and any refinery outage disclosures in the coming weeks for the first reliable read on actual capacity lost.