A Russian 'mystery plane' spotted in North Korea is making Washington nervous, after Kim Jong Un visited Russia to meet with President Vladimir Putin this moth. The two leaders, deemed 'rogue' actors by the West, are believed to have discussed and possibly inked a weapons deal at a moment Moscow needs more ammunition for military operations in Ukraine.

Citing aviation tracking site FlightRadar24, Bloomberg described it as an an unscheduled Russian military VIP plane that landed in Pyongyang earlier this week.

The aircraft was in the North Korean capital for two days, however, both countries have kept mum as to its purpose. It could have been transporting another high-level Russian defense delegation.

"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," Bloomberg noted.