Flights at Germany's Leipzig/Halle Airport were suspended overnight on Aug. 5 after a "modified drone" was sighted and later found next to a Ukrainian Antonov Airlines An-124 transport aircraft, and a second "unidentified flying object" collided with an incoming DHL cargo plane. The "modified drone" contained an "unknown substance" and a "detonator," according to police sources speaking to German media outlet Süddeutsche Zeitung. "The incidents at Leipzig Airport constitute a very serious security incident," Saxon State Interior Minister Armin Schuster said in a statement. Leipzig/Halle Airport has served as a base for Ukraine's Antonov Airlines since shortly after the launch of Russia's full-scale invasion. According to the German outlet Bild, four Ukrainian cargo aircraft were present during the suspected attack.