Russian President Vladimir Putin on Sunday warned that Moscow will hit new targets if the West supplies Ukraine with long-range missiles, hours after several explosions rocked the Ukrainian capital Kyiv.

The battle for the control of the strategically important eastern city of Severodonetsk also raged on, with regional governor Sergiy Gaiday saying Ukrainian forces now control “half of the city”.

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Thousands of civilians have been killed and millions were forced to flee their homes since the Russian President ordered his troops into Ukraine on February 24.

The Russian leader said long-range missile supplies being sent to Ukraine meant that “we will draw the appropriate conclusions and use our arms… to strike targets we haven’t hit before”.

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He did not specify which targets he meant.

Putin’s comments came after last week the United States said it would supply Ukraine with advanced missile systems, the latest in a long list of weaponry sent or pledged for the pro-Western country.

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Ukraine has asked for even more potent arms and its deputy defence minister stressed on Sunday this support was needed until Russia was defeated.

Speaking to local media, Ganna Malyar said, “We have already entered into a protracted war and we will need constant support.”

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“The West must understand that its help cannot be a one-time thing, but something that continues until our victory,” she added.