Russia and North Korea have opened their first road bridge across their shared border, marking another step in their rapidly growing relationship.

The one-kilometer, two-lane bridge crosses the Tumen River and connects Russia’s Khasan area with North Korea’s Tumangang region.

The bridge is expected to handle up to 300 vehicles a day and could eventually support passenger traffic, expanding trade and travel between the two countries.

The new crossing adds to existing rail and air connections and comes as North Korea has provided Russia with troops and ammunition for its war in Ukraine, the BBC has reported.

Officials say the bridge will strengthen economic and cultural ties, while critics warn it could also make it easier to move military supplies and personnel between the two countries.