From YONHAP News agency

h/t Richard

By Kim Kwang-tae
SEOUL, Nov. 13 (Yonhap) — Hundreds of North Korean nuclear and missile experts have been collaborating with their Iranian counterparts in more than 10 locations across the Islamic state, a diplomatic source said Sunday.

The revelation lends credence to long-held suspicions that North Korea was helping Iran with a secret nuclear and missile program.