Moscow warned Lithuania of "serious" consequences on Tuesday over its restriction of rail traffic to Russia's Kaliningrad exclave, as Kremlin forces made gains in Ukraine's strategic Donbas region.
Kremlin troops were causing "catastrophic destruction" in Lysychansk, an industrial city at the forefront of clashes in the eastern Donbas, the region's governor said. Ukraine confirmed Russia had taken frontline village Toshkivka.
Governor Sergiy Gaiday said "every town and village" in Ukrainian hands in Lugansk region was "under almost non-stop fire".
Since being repelled from Kyiv and other parts of Ukraine following its invasion in February, Moscow is focusing its offensive on the strategic Donbas region.
In the eastern town of Sloviansk, which could become a flash point as Russian troops advance from the north, local people were preparing to withstand attack and the authorities said the community would defend itself.
"We believe they'll beat the Russian scum," resident Valentina, 63, said of local Ukrainian forces.
The stakes are high. The town was seized by Russia-backed separatists in 2014 and then retaken by Ukrainian forces after a lengthy siege.
'Serious' consequences
Russia's war of words with EU member Lithuania escalated on Tuesday, vowing "serious" consequences over Vilnius' restrictions on rail traffic to the exclave of Kaliningrad.
Lithuania says it is simply adhering to EU-wide sanctions on Moscow but Russia countered, accusing Brussels of "escalation".
Moscow summoned the EU's ambassador to Russia. Its foreign ministry said Lithuania's actions "violate the relevant legal and political obligations of the European Union".
On the ground, the police chief of the Kyiv region said victims of the Russian attempt to seize the capital city continued to be found. So far, the bodies of 1,333 civilians have been discovered and 300 people still missing.
On the maritime front, Russia's navy is blockading ports, which Ukraine says is preventing millions of tonnes of grain from being shipped to world markets, contributing to soaring food prices.
Prior to the war, Ukraine was a major exporter of wheat, corn and sunflower oil.
With European officials due to gather this week at a summit expected to approve Ukraine's candidacy to join the EU, Brussels foreign policy chief Josep Borrell called the Russians' port blockade "a real war crime".
He said it was happening "while in the rest of the world people are suffering hunger".
Moscow denies responsibility for the disruption to deliveries and, following Borrell's comments, blamed the West's "destructive" position for surging grain prices.
Growing concerns about a food crisis are "the fault of Western regimes, which act as provokers and destroyers", said foreign ministry spokeswoman Maria Zakharova.
Ukrainian President Volodymyr Zelensky said Kyiv was engaged in "complex negotiations" to unblock grain exports, although he cautioned that there was no progress as yet.
In an address to the African Union, he said the continent was a "hostage" of the conflict, and rising food prices had "already brought (the war) to the homes of millions of African families".
The EU has pledged an additional 600 million euros ($635 million) to help vulnerable nations weather the food security crisis.
