A new drone bomber may have joined Ukraine’s escalating assault on Russia’s oil industry. On Wednesday night or early Thursday morning, drones operated by the Ukrainian 14th Separate Unmanned Aerial Vehicle Regiment struck a pumping station on the Druzhba pipeline along the Russian-Belarusian border in Bryansk Oblast.

Officials say a Russian drone has blasted a hole in an apartment building in northeastern Ukraine during a nighttime attack that killed at least six people and wounded nine others

The reported strike comes two nights after Ukrainian forces launched a joint attack against the refinery that allegedly damaged multiple on-site facilities.