Japan and South Korea on Friday announced separate sanctions packages targeting companies, vessels, or individuals allegedly involved in supplying North Korean weapons to Russia for use in Ukraine, in violation of UN resolutions.

South Korea accuses Pyongyang of sending thousands of containers of munitions to Russia, and experts have said Pyongyang’s recent testing spree may be of weapons destined for use on battlefields in Ukraine.

In August, the US Treasury Department imposed similar sanctions as it said Russia was using up munitions and losing heavy equipment in Ukraine — forcing Moscow to turn to its few allies, including Pyongyang, for support.

Japan’s top government spokesman Yoshimasa Hayashi said Friday the country “strongly condemns” the alleged deals.