The Russian Defence Ministry has announced that Ukrainian air defences have been neutralised.
"The military infrastructure of Ukrainian military air bases has been put out of action", the statement read. "The air defences of the armed forces of Ukraine have been neutralised".
The Russian MoD also noted that the border services of Ukraine "do not show any resistance" to Russian troops.
Previously, the MoD stated that precision weapons had been used to neutralise Ukrainian military infrastructure and air forces, stressing there were no threats to the civilian population.
The tensions around Ukraine have been escalating over the past few days, as attacks in Donbass by the Ukrainian military resulted in thousands of people being evacuated to Russia.
Following an appeal from the Donetsk and Lugansk People's Republics, Moscow recognised their independence and ratified friendship and cooperation treaties with them, promising to protect the people of Donbass against any threats.
On Thursday, Russia launched a military operation in Donbass. President Putin said that the goal is to protect the people of the region "who have been subjected to abuse, genocide by the Kiev regime for eight years", and noted that Moscow's aim is for the demilitarisation and denazification of Ukraine.