Vladimir Putin is leading Russia's Victory Day commemorations with a parade in Red Square and ramped up security after days of Ukrainian strikes targeting the capital. Chinese President Xi Jingping is among more than 20 international leaders who have made the journey to Moscow.

Kyiv accused Moscow of breaching its own ceasefire on Thursday, saying Russian forces struck hundreds of times along the front lines and launched guided bombs that killed and wounded civilians in several Ukrainian cities.

U.S. President Donald Trump called on Thursday for a 30-day unconditional ceasefire between Russia and Ukraine, warning that Washington and its partners would impose further sanctions if the ceasefire is not respected.