Russia is experiencing another collapse in its airports due to airspace restrictions. Hundreds of flights have been canceled for the second day in a row, especially in Moscow and St. Petersburg, according to Russia's Federal Agency for Air Transport and Moscow Mayor Sergey Sobyanin.

Ukraine said it struck a Russian air base on Saturday, while Russia continued to attack Ukraine with hundreds of drones overnight as part of a stepped-up bombing campaign that has dashed hopes for a breakthrough in efforts to end the more than 3-year-old war.

Hundreds of flights were delayed or canceled due to Ukrainian drone strikes on Saturday and overnight, according to Russia’s Transport Ministry.