SEOUL, South Korea — A top Russian security official traveled to North Korea on Friday to meet leader Kim Jong Un, after North Korea recently reportedly sent additional troops to Russia to support its war against Ukraine.

A brief dispatch by Russia's state-run news agency Tass reported that Sergey Shoigu, Russia's Security Council secretary, had arrived in Pyongyang, the North Korean capital, and plans to meet top North Korean officials including Kim. It gave no further details including what Shoigu would discuss with Kim.