Two Russian government aircraft appeared to travel to North Korea in the dark of night last week, including a cargo plane the U.S. previously accused of delivering DPRK ballistic missiles for use against Ukraine, according to NK Pro analysis of flight tracking data.

It is the latest in a steady stream of unpublicized Russian military flights to North Korea since last fall, amid questions about whether Moscow is acquiring short-range ballistic missiles (SRBMs) from the DPRK by sea or by air.

Flightradar24 data shows a Russian 224th Flight Unit State Airlines Antonov An-124 cargo