The moment of UAV explosion over the Kremlin.

Ukraine tried to attack the Kremlin with drones on the night of Tuesday May 2th to Wednesday 3th. This action is considered by Moscow as an assassination attempt against President Vladimir Putin and qualifies as a planned terrorist act.
"As a result of timely actions taken by the military and special services with the use of radar warfare systems, the vehicles were taken out of service," the Kremlin press service said, adding that neither Putin nor any other person was injured in the attack.

The Russian authorities stressed that they reserve the right to respond where and when they see fit.

Ukraine denies responsibility
In turn, the Ukrainian presidential spokesman, Sergei Nikiforov, stated that kyiv had no knowledge of the attack. "We have no information about the so-called night attacks against the Kremlin," the spokesman said, stating that "Ukraine uses all means at its disposal to liberate its own territory, not to attack others."
It should be remembered that before the incident occurred, the head of the Ukrainian Presidential Office, Andrei Yermak, had published a single rocket on Telegram and later an emoji with emergency lights. Later, the official deleted this last message.