North Korea has shipped over 13,000 containers to Russia through the northeastern port of Rason, according to South Korean military estimates, pointing to a major spike in recent shipments of DPRK arms for use against Ukraine.

The figure marks an increase from Seoul’s estimate of 7,000 containers in March and means North Korea may have shipped artillery shells to Russia in support of its invasion, according to the Defense Intelligence Agency (DIA) assessment provided to People Power Party lawmaker Kang Dae-sik.