On Wednesday, Russia accused Ukraine of attempting to assassinate President Vladimir Putin by using drones to target his residence in the Kremlin in central Moscow.
In a statement, the Russian presidential office said defenses downed two drones overnight. Putin's spokesman said the Russian leader had not been in the complex at the time.
Unverified footage on social media appeared to show an object flying over the Kremlin before a small explosion.
Ukraine claimed that it had nothing to do with the drone strike.
On its part, the Russian embassy in Egypt said that two unmanned aerial vehicles targeted the Kremlin. Timely action by the military and special services involving radar systems enabled them to disable the devices.
They crashed into the Kremlin grounds, scattering fragments without causing any casualties or damage.
"We consider these actions a premeditated terrorist attack and an assassination attempt targeting the President, carried out ahead of Victory Day and the May 9 Parade, where foreign guests are expected to be present, among others, the embassy said.
It added that President Putin has not suffered in this terrorist attack. His working schedule remains unchanged and follows its ordinary course.
The embassy noted that Russia reserves the right to take countermeasures wherever and whenever it deems appropriate.
Notably, the two countries frequently trade accusations and denials since the full-scale Russian invasion in February 2022.