The Russian president acknowledged Ukraine's attacks were "obviously creating problems" but denied the shortages were "critical".
"We can't take up arms to defend Ukraine, but we can take a stand with our friends."
Stefan Sivers, 35, of Aberdeen, is reported to have been fighting against Russian forces in the Kharkiv region.
Why do Russian warships sail in the English Channel and what laws are in place to regulate their passage.
Col Dmytro Kozyura agreed to share state secrets and systematically disclosed classified information, prosecutors say.
Ukraine's Volodmyr Zelensky skips major conference aimed at rebuilding his country after being stripped of a Polish state honour.
Sevastopol's Moscow-installed governor warns there will be no electricity in some areas until the evening.
In the biggest city Sevastopol, one resident told the BBC he had bought a back-up generator but had nothing to power it with.
If Kostyantynivka falls, Russian forces would be able push towards Ukraine's last remaining strongholds in the east.
There are moments when life in Moscow feels completely normal - Thursday morning wasn't one of them, writes Steve Rosenberg.
A refinery and a shopping centre burned after almost 200 Ukrainian drones were launched towards an area to the south-east of the Russian capital.
Steve Rosenberg explains what Russia's next steps may be after frequent Ukrainian drone attacks.
