South Korea’s intelligence service is conducting a review into suspicions that North Korea has provided Russia with artillery shells and other weaponry manufactured in the 1970s, the country’s National Intelligence Service (NIS) said on May 12. The NIS’ remarks come in response to recent South Korean media reports that allege 122 mm artillery shells manufactured in North Korea in the 1970s were used on Ukraine’s eastern front. Both Ukrainian and U.S. officials have previously confirmed that Russia has been using North Korean-produced weaponry to attack Ukraine. “The NIS is analyzing the releva…