It accused Ukraine on Wednesday of attacking the Kremlin with drones overnight in a failed attempt to kill Putin, according to Reuters.
Russia has accused Ukraine of making attempting to kill President Vladimir Putin.
It accused Ukraine on Wednesday of attacking the Kremlin with drones overnight in a failed attempt to kill Putin, according to Reuters.
But a senior Ukrainian presidential official has denied the allegation, saying Kyiv had nothing to do with the purported incident.
Russia accused Ukraine of using two drones in an attack on Putin's residence in the walled Kremlin citadel but that they were disabled by electronic defences.
It said Russia reserved the right to retaliate - a comment that suggested that Moscow might use the alleged incident to justify a further escalation in its war with Ukraine.
"Two unmanned aerial vehicles were aimed at the Kremlin. As a result of timely actions taken by the military and special services with the use of radar warfare systems, the devices were put out of action," the Kremlin said in a statement.
"We regard these actions as a planned terrorist act and an attempt on the president's life, carried out on the eve of Victory Day, the May 9 Parade, at which the presence of foreign guests is also planned ...
"The Russian side reserves the right to take retaliatory measures where and when it sees fit."
Baza, a Telegram channel with links to Russia's law enforcement agencies, posted a video showing a flying object approaching the dome of the Kremlin Senate building overlooking Red Square – the site of the Victory Day parade - and exploding in an intense burst of light just before reaching it.
Reuters said it could not immediately verify the video's authenticity.
The statement from the presidential administration said fragments of the drones had been scattered on the territory of the Kremlin complex but there were no casualties or material damage.
RIA news agency said Putin was not in the Kremlin at the time and was working on Wednesday at his Novo Ogaryovo residence outside Moscow.
Another video circulating on Russian social media appeared to show a plume of smoke over the Kremlin after the purported attack.
The video was posted in the early hours of Wednesday on a group for residents of a neighbourhood that faces the Kremlin across the Mosvka River. It was picked up by Russian media, including the Telegram channel of the military news outlet Zvezda.