North Korea’s fleet of ships was largely idle in mid-to-late November, supporting South Korean government claims that the country’s concerns over COVID-19 are escalating.

Only one North Korean vessel was seen voyaging between the DPRK city of Nampho and the Chinese city of Dalian between Nov. 18 and Nov. 30, and North Korea has made few international voyages in recent months. Instead, the country’s fleet appears to be making more domestic trips along its east coast.

Last week, South Korean lawmakers claimed that the DPRK banned fishing and sea salt production for fear of