(3rd LD) N. Korea to expel Malaysian envoy in row over airport killing

(ATTN: UPDATES with North Korea's decision to expel Malaysia envoy in first 5 paras; CHANGES headline; AMENDS dateline; TRIMS)

SEOUL/KUALA LUMPUR, March 6 (Yonhap) -- North Korea said Monday it has decided to expel the Malaysian ambassador to Pyongya