An unscheduled Russian military VIP plane touched down in Pyongyang this week, days after North Korean leader Kim Jong Un made a rare trip to his neighbor for talks the U.S. said likely focused on arms transfers.

Tracking data from FlightRadar24 shows the Russian Air Force Ilyushin IL-62M flying from Moscow to Pyongyang, arriving on Tuesday morning. The tail number on the plane indicates it was the same aircraft Russia sent to North Korea in August, just days after Defense Minister Sergei Shoigu traveled to Pyongyang and was guided by Kim through a collection of his country’s latest weaponry.

Data from FlightRadar24 also indicates the plane returned to Russia on Thursday after having been on the ground in North Korea for about two days. North Korean state media has made no mention of the plane and the Russian Defense Ministry did not respond to a request for comment sent by email.