Poland summoned Russia’s ambassador on Friday, July 31, after a Russian cruise missile landed on Polish territory during an overnight barrage on Kyiv the day before, Thursday, July 30.Prime Minister Donald Tusk announced the diplomatic step on X.JOIN US ON TELEGRAMFollow our coverage of the war on the @Kyivpost_official.According to Poland’s Deputy Defense Minister, Cezary Tomczyk, Polish authorities can now confirm “with full responsibility” that the projectile was a Russian Kh-101, an air-launched cruise missile carried by Russian strategic bombers.“Today, the Polish Foreign Ministry summoned the Russian ambassador in connection with the missile that hit Polish territory yesterday,” Tusk wrote.A similar incident occurred less than a week earlier, prompting Romania to order a Russian embassy employee to leave the country within five days. Over the weekend of July 24-26, Romanian forces scrambled F-16 fighter jets to shoot down three stray Russian drones over three consecutive days.Romania’s foreign ministry called the decision a “firm response” to drones repeatedly breaching NATO’s airspace.Kyiv pledges cooperation on the investigationUkraine’s Foreign Minister Andrii Sybiha held phone talks with his Polish counterpart Radoslaw Sikorski following the missile incident in Poland, pledging that Kyiv would provide all assistance necessary to investigate the incident.The call signaled improved Kyiv-Warsaw coordination.On Wednesday, July 29, President Volodymyr Zelensky met with Tusk in Lublin, marking his first trip to Poland after weeks of strained relations triggered by Ukraine’s decision to grant an unit of the Armed Forces of Ukraine (AFU) the honorary title “Heroes of the UPA,” a reference to the Ukrainian Insurgent Army, which Poland blames for the mass killings of Polish civilians in Volhynia during and after World War II.