North Korean leader Kim Jong Un and Russia’s defense minister discussed practical issues to boost military cooperation, state media said on Sunday.

During his visit to Russia, Kim also inspected Russian nuclear-capable strategic bombers, hypersonic missiles, and warships on Saturday, accompanied by Russian Defence Minister Sergei Shoigu.

Continuing his now week-long train journey, Kim will go to several food enterprises, Russia’s RIA news agency reported on Sunday.

The trip by the North Korean leader, who seldom leaves his country, comes as “a fresh heyday of friendship and solidarity and cooperation is being opened up in the history of the development of the relations between the DPRK and Russia,” state KCNA news agency said, using the initials for the Democratic People’s Republic of Korea.

Earlier, Kim met Russian President Vladimir Putin on Wednesday and discussed military matters, the war in Ukraine, and deepening cooperation.

South Korea and the US said on Friday that military cooperation between North Korea and Russia would violate U.N. sanctions against Pyongyang and that the allies would ensure there was a price to pay.