The country started drafting reservists aged 18-60 following a decree by President Volodymyr Zelensky.
Several Ukrainian state websites, including the government and foreign ministry home pages, were inaccessible on Wednesday.
Ukraine’s minister of digital transformation said that Ukrainian banks had also been hit by denial of service attacks.
Ukrainian authorities said this week they had seen online warnings that hackers were preparing to launch major attacks on government agencies, banks and the defense sector.
Ukraine has suffered a string of cyberattacks that Kyiv has blamed on Russia. Moscow, which is caught up in a mounting confrontation with the West over Ukraine, has denied any involvement.
Ukraine on Wednesday has started conscripting reservists aged 18-60 following a decree by President Volodymyr Zelensky, the armed forces said in a statement.
The maximum service period is one year.
Zelensky on Tuesday said he was introducing the conscription of reservists but ruled out a general mobilization after Russia announced it was moving troops into eastern Ukraine.
Russia has started evacuating diplomatic staff from all of its missions in Ukraine, TASS news agency reported on Wednesday, citing a representative of the Russian Embassy in Kyiv.
The embassy as well as the consulate general in Odessa were seen on Wednesday with Russian flags taken down.
“Several cars left the territory of the consulate in the morning,” a member of the Ukrainian National Guard who was on duty near the Russian consulate in Odessa told Reuters.
Russia’s foreign ministry announced an evacuation of diplomatic staff from Ukraine for what it called safety reasons on Tuesday, a day after President Vladimir Putin recognized the independence of two breakaway regions in Ukraine’s east and ordered Russian troops “to keep the peace” there while massing military along Ukrainian borders.
Last week a video showing smoke rising from the Russian Embassy’s chimney circulated online. An employee said that staff had burnt documents before departure, TASS quoted him as saying on Wednesday.
“This is an ordinary procedure. In cases like we have now there is a set of measures that should be taken for security reasons,” the employee said, according to TASS.
Ukraine’s Foreign Ministry requested President Volodymyr Zelensky to break off diplomatic ties with Russia in response to the recognition of the independence of separatist-held regions.
Zelensky said on Tuesday he was weighing the request.
As reported by The Jerusalem Post