After an unidentified flying object (UFO) was sighted over the Russian city of Saint Petersburg on February 28, Russia scrambled its fighter jets to intercept the unknown mystery object which was allegedly seen flying in the direction of the gulf of Finland.
200 square kilometers of airspace were blocked, and the neighboring Pulkovo Airport stopped admitting flights for landing. According to Russian News agencies, the Kover plan was activated in Saint Petersburg due to an unidentified object in the sky. Aircraft were banned from entering Pulkovo Airport. The limitations were later lifted. (The Kover plan is used in illegal border crossings or imaging.)
Although some Russian media reports suggest that the UFO was possibly a drone in the area, you may wonder whether it was a drone or an unidentified flying object similar to the unknown objects flying over the US.