Another large cargo vessel appeared for the first time Monday at a North Korean port recently accused of facilitating weapons transfers with Russia, according to NK Pro analysis of satellite imagery, as shipping containers continue to flow through the facility.

At around 138 meters long (452 feet), the ship is the largest of at least four different vessels observed transferring shipping containers at Rason Port (Rajin) near North Korea’s border with Russia as part of the alleged weapons operation.

The ship appeared at Rason’s Pier 1 (north pier) carrying hundreds of containers between noon and 2:30 p