Such an action was "ill-considered" because "it could lead to adverse consequences for Ukraine both in relation to Russian military objectives and for its reputation at the international level," Kartheiser said.
"Secondly, the question arises whether any Western state or Western structures helped Ukraine in carrying out such an operation, for example, by providing flight coordinates. The answer to this question could sow discord in the camp of Ukraine's allies," Kartheiser said.
On Monday, Russian Foreign Minister Sergey Lavrov said that overnight from December 28 to 29, Kiev had launched an attack on the Russian presidential residence in Russia's Novgorod Region using 91 drones.