Kyiv [Ukraine], October 21 (ANI): As many as 4 people were killed in an attack in Ukraine's Kherson which Russia blames it on Kyiv of using US-supplied HIMARS missiles to attack civilians evacuating from annexed region.

This comes two days after Russian President Vladimir Putin announced that it would impose martial law in the four regions in Ukraine he illegally annexed last month as his military struggles to maintain its grip on territory amid Ukrainian advances, Al Jazeera reported.

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Ukrainian forces "launched a missile attack on a civilian crossing", said Kirill Stremousov, the Russian-installed deputy governor of Kherson.

A Ukrainian official acknowledged an attack but said it occurred after a civilian curfew.

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He did not say what weapons were used.

Earlier, on Wednesday, announced the imposition of martial law in four areas of Ukraine that Russia announced it had annexed last month.

The four regions occupied by Russian are Donetsk, Luhansk, Kherson and Zaporizhzhia. Putin made these comments during a security council meeting, CNN reported.

"In this regard, let me remind you that in the Donetsk People's Republic, the Luhansk People's Republic, as well as in the Kherson and Zaporizhzhia regions, martial law was in effect before joining Russia," Putin said during a televised address.

"Now we need to formalize this regime within the framework of Russian legislation," he said, adding that a decree of martial law in these four regions of the Russian Federation has been introduced formally and will be immediately sent to the Federation Council, CNN reported.

Earlier, the Russian leaders in the annexed regions started relocating people in huge number

After Russia annexed four Ukrainian regions of Donetsk, Luhansk, Kherson and Zaporizhia, concerns have sparked globally that Moscow could resort to nuclear weapons.

Putin formally announced the annexation of four regions - Donetsk, Luhansk, Kherson and Zaporizhia recently and claimed that "this is the will of millions of people," according to CNN.

Putin said the residents in the four annexed regions will now be Russia's "citizens forever".Russia's annexation has sparked wide criticism from around the world. The United States announced that it will impose a "swift and severe cost" on Russia.

Meanwhile, US Secretary of State Antony Blinken said that the "United States unequivocally rejects Russia's fraudulent attempt to change Ukraine's internationally recognized borders."

After Putin's formal announcement of the annexation of the said four regions, western leaders condemned it, termed it "illegal" and vowed that they will "never recognize" these areas. (ANI)

(The above story is verified and authored by ANI staff, ANI is South Asia's leading multimedia news agency with over 100 bureaus in India, South Asia and across the globe. ANI brings the latest news on Politics and Current Affairs in India & around the World, Sports, Health, Fitness, Entertainment, & News. The views appearing in the above post do not reflect the opinions of LatestLY)