Ukraine on Sunday said its forces hit an ultra-modern Russian warplane stationed on an air base nearly 600 kilometers (370 miles) from the front lines, after its Western allies allowed Kyiv to use their weapons for limited strikes inside Russia.

Kyiv’s main military intelligence service shared satellite photos it said showed the aftermath of the attack. If confirmed, it would mark Ukraine’s first known successful strike on a Su-57 fighter plane, a twin-engine stealth fighter lauded as Moscow’s most advanced military aircraft.

In one photo, black soot marks and small craters can be seen dotting a concrete strip around the parked aircraft. According to the Main Intelligence Directorate of Ukraine’s Ministry of Defense, the strike took place on Saturday at the Akhtubinsk base in southern Russia, some 589 kilometers (366 miles) from the front line.