"We are suffering from a severe shortage of artillery shells and other types of weapons," Kuleba said.
He added that Ukrainian troops are under pressure from superior Russian forces. The White House had previously warned that the funds at its disposal to support Ukraine are exhausted, and there will be no new supplies of weapons and ammunition until the US Congress approves additional funding.
Last April, Russia sent a note of protest to NATO on account of its weapons deliveries to Ukraine. Russian Minister of Foreign Affairs Sergey Lavrov said that any such deliveries would be a legitimate target for the Russian military and that NATO is "playing with fire".