A Ukrainian journalist has thanked an ally of President Vladimir Putin for a “tip” that may have accidentally exposed the location of Russian troops in eastern Ukraine.

In a post on Telegram that now appears to be deleted, an adviser to the governor of Russia’s Oryol region, Sergei Lezhnev, published photos and videos on November 14 of a location where “humanitarian aid” was being unloaded in the city of Kreminna, in the partially occupied Ukrainian region of Luhansk. The next day, the area was reportedly attacked by Ukraine’s Armed Forces. There were no injuries.

Kyiv in early June kickstarted a long-planned operation to recapture Russian-occupied areas, which includes eastern Ukraine’s Luhansk and Donetsk regions, Kherson and Zaporizhzhia. Ukrainian President Volodymyr Zelensky has also vowed to recapture Crimea, the Black Sea peninsula that was annexed by Putin in 2014.