Russian Far East officials traveled to North Korea aboard the first passenger train to visit the country in years last week, local authorities have revealed, inspecting local infrastructure as part of plans to resume regular rail service between the two countries.

The officials inspected some 20 miles (30 km) of railway between Khasan Station in Russia and Tumangang Station in the DPRK as part of the trial run, according to a press release from the Primorsky Krai Tourism Agency.

Russia’s Federal Customs Service announcedon Thursday that the train carrying 41 travelers had entered the DPRK, but it did not