Russian President Vladimir Putin blamed Ukraine for the drone attack in the Moscow region, calling it a "clear sign of terrorist activity."
"Kyiv chose the path of intimidation of Russian citizens and attacks on residential buildings," he said, adding: "We are concerned about attempts to evoke a response from Russia. It seems that is what they [Ukraine] want ... Kyiv provokes us to mirror actions. We will see what to do about this."
The Russian president said the city's air defenses worked normally.
"The Moscow air defense system worked satisfactorily. However, there is still work to be done to make it better," Putin said in brief remarks carried by Russian state media TASS.
Putin suggested that the drone attacks had been in response to recent Russian strikes against Ukrainian infrastructure.
"The Russian Armed Forces strike exclusively with long-range high-precision weapons and only at military infrastructure facilities. Of course, some portion of these strikes is aimed at the military headquarters as well as headquarters of the Ukrainian military intelligence, which was hit two to three days ago," he said.
Ukraine has not commented on any strike against the headquarters of its military intelligence.