Russian-occupied Melitopol was rocked by a large explosion Tuesday. President Volodymyr Zelensky presented a 10-point peace plan to end Russia's invasion of Ukraine.
Read MoreA missile strike on Odesa Sunday threw into doubt the start of grain shipments from Ukraine and across the Black Sea. Meanwhile. Polish border authorities have said that more than 5-million Ukrainians have fled into their country since Russia's invasion began on February 24.
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