French-built spy drone spotted on Poland-Belarus border

A Safran Patroller surveillance drone flew along Poland’s eastern border with Belarus on Thursday, passing near the Białowieża Forest and the town of Hajnówka, flight-tracking data showed.

The flight was flagged on X by the open-source account Coffe Report. A Flightradar24 capture from 14:50 UTC listed the aircraft as a Safran S-15 Patroller, categorized as military or government, with no registration, operator or country of registration shown. At that moment it was flying at about 1,800 m (5,900 feet) at a ground speed of 117 km/h (73 mph), heading north a few kilometers from the Belarusian border.

The track began east of Warsaw and ran northeast past Sokołów Podlaski and Siemiatycze before bending north along the frontier. Neither the Polish Ministry of National Defense nor any allied military has said who was flying the drone or what it was looking for.

The Patroller is a French medium-altitude, long-endurance drone built by Safran Electronics & Defense on the airframe of the Stemme S15 motor glider, which explains the S15U type code on the tracker. It first flew in 2009 and entered service with the French Army in 2023. Flight tests showed it could stay aloft for 20 to 30 hours and carry up to 250 kg (550 pounds) of sensors and equipment.

Safran fits the drone with its Euroflir 410 day-and-night camera pod, paired with either a sensor that intercepts radio communications or a radar that can spot moving vehicles on the ground. A maritime version carries a sea-search radar and a ship-identification receiver.

Poland has not publicly announced buying the Patroller. French forces have operated in Poland since September 2025, when France sent three Rafale fighters under NATO’s Eastern Sentry mission, launched after at least 19 Russian drones crossed into Polish airspace on Sept. 10 of that year. Polish F-16s and Dutch F-35s shot down several of them.

The stretch of border the drone flew along is among the most heavily fortified in Europe. Poland built a steel barrier along the Belarusian frontier in 2022 and 2023, and it runs through the Białowieża Forest, where migrants pushed by Belarusian authorities have repeatedly tried to cross.

Warsaw is now adding a layer against drones. In December 2025, Deputy Defense Minister Cezary Tomczyk said Poland would spend more than €2 billion ($2.28 billion) over two years on a counter-drone network along its borders with Belarus and Russia’s Kaliningrad region. The first radar went up on a tower more than 70 m (230 feet) high near Krynki, north of Hajnówka, and Interior Minister Marcin Kierwiński declared the first counter-drone cluster operational in March 2026. That network sits alongside East Shield, a separate program budgeted at about €2.2 billion ($2.5 billion) for ground fortifications along the same frontier.

Russia has also built launch and relay sites for attack drones near the Belarusian border, according to a June 2026 investigation by InformNapalm, which linked some of that infrastructure to the September 2025 incursion.

The tracking data did not show where the Patroller took off, how long it stayed on station or whether it crossed into Belarusian airspace. Flight-tracking services show only aircraft that broadcast their position, and military flights often switch transponders off.