WARSAW, Poland—An object believed to be an observation balloon entered Polish airspace from Belarus and flew over the country for several hours before disappearing from radar, prompting the military to carry out a search by air and on the ground on Saturday.
Polish President Andrzej Duda linked the object and previous objects that have entered Polish airspace to the war that Russia is waging in Ukraine, which lies on Poland’s eastern border. Belarus, an ally of Russia, also lies on Poland’s northeastern border.
“Never has war been so close to us, never been so tangible,” Duda said on a visit to Ustka on the Baltic Sea coast, where the Polish military was holding a large exercise….