Ukrainian air monitoring channels reported on Friday, September 13th, 2025, between 9:46 PM and 10:00 PM UTC, that unmanned aerial vehicles (UAVs) were active over the Chernihiv and Sumy regions. Specifically, "єРадар" reported two UAVs out of the Sumy region and a "Shahed" drone in the Chernihiv region. "єРадар" also indicated UAVs were over Chernihiv city, following an old course. During this period, air raid alerts were active in the Chernihiv region, with reports of a "Shahed" drone present. The Sumy region also saw activity, with "єРадар" noting two UAVs out of the region. These developments follow earlier reports on September 13th, 2025, of enemy tactical aviation deploying managed aviation bombs targeting the Zaporizhzhia and Donetsk regions, and sounds of explosions being heard near Kyiv. Earlier in the broader reporting period, Ukrainian Air Force monitoring channels had reported an enemy UAV detected in the Sumy region proceeding towards Poltava. This information was based on Russian sources outlining approximate flight routes of Ukrainian strike UAVs. The "ЗАГРОЗА З НЕБА" channel also announced threats towards Donetsk. In related regional activity, Polish army presence was reported on the border. Previous reports indicated multiple Russian Aerospace Forces aircraft landed at Lida Air Base in Belarus on Friday, September 13th, 2025, around 09:00 UTC, linked to the "West 2025" military exercise. On the night of September 9th to 10th, a Belarusian Air Force Su-30SM reportedly shot down a UAV during large-scale Russian UAV attacks on Ukraine and Poland. Poland had issued air raid warnings in its Lubelskie Voivodeship on Friday due to aerial attack threats, and its Lublin Airport was closed due to "unplanned military activity related to ensuring state security."