SEOUL, Oct 31 (Reuters) – North Korea’s recent closing of its diplomatic missions in Angola and Uganda was a sign that the reclusive country is struggling to make money overseas because of international sanctions, South Korea’s unification ministry said on Tuesday.

Both Angola and Uganda have forged friendly ties with North Korea since the 1970s, maintaining military cooperation and providing rare sources of foreign currency such as statue-building projects.

But on Monday, Pyongyang’s state media outlet KCNA said its ambassadors paid “farewell” visits to Angolan and Ugandan leaders last week, and local media in both African countries reported the shutdown of the North’s embassies there.

Seoul’s unification ministry, which handles inter-Korean affairs, said the pullout reflected the impact of international sanctions aimed at curbing funding for the North’s nuclear and missile programs.

“They appear to be withdrawing as their foreign currency earning business has stumbled due to the international community’s strengthening of sanctions, making it difficult to maintain the embassies any longer,” the ministry said in a statement. “This can be a sign of North Korea’s difficult economic situation, where it is difficult to maintain even minimal diplomatic relations with traditionally friendly countries.”

North Korea has formal relations with 159 countries, but had 53 diplomatic missions overseas, including three consulates and three representative offices, until it pulled out of Angola and Uganda, according to the ministry.

Japan’s Yomiuri Shimbun newspaper reported last week, citing unnamed sources, that North Korea was planning to shut down at least 10 diplomatic missions, including a consulate in Hong Kong, largely because of economic difficulties.

(Reporting by Hyonhee Shin; Additional reporting by Hyunsu Yim; Editing by Gerry Doyle)