Russia claimed on Thursday that it is targeting only military infrastructure of Ukraine with high-precision weapons.
The Defense Ministry said in a statement that nothing threatens Ukrainian cities or civilians.
"The servicemen of Ukraine's border service do not show any resistance to the Russian units. The air defense of Ukraine's armed forces has been suppressed. The military infrastructure of the air bases of Ukraine's armed forces has been disabled," the statement said.
The statement also claimed that Ukrainian servicemen are abandoning their positions, leaving their arms behind.
Meanwhile, the ministry denied the Ukrainian military's claim that it shot down Russian fighter planes and disabled armored vehicles, calling it a "total lie."
Earlier in the day, Ukraine's Joint Forces Command announced that at least five Russian aircraft and one helicopter were shot down.
Russian President Vladimir Putin announced a special military operation in eastern Ukraine's Donbas region early Thursday.
The Russian intervention followed Moscow's recognition of the two eastern Ukrainian breakaway regions of Luhansk and Donetsk on Monday.
The announcement drew global condemnation as a violation of the UN Charter and international law, with Western countries announcing new sanctions against Russia.
In 2014, after invading Ukraine's Crimean Peninsula, Moscow began supporting separatist forces in eastern Ukraine against the central government, a policy that it has maintained ever since. The conflict has taken more than 13,000 lives, according to the UN.
Putin's latest moves come after Russia amassed 100,000 troops and heavy equipment in and around its neighbor, prompting the US and other Western countries to accuse Moscow of preparing for an invasion.
Russia denied that it was preparing for an invasion, instead claiming that the West was undermining its security by expanding NATO to its borders.Anadolu Agency website contains only a portion of the news stories offered to subscribers in the AA News Broadcasting System (HAS), and in summarized form. Please contact us for subscription options.