(2nd LD) S. Korea promptly coordinates with U.S. and Japan over N.K. missile provocation
(ATTN: ADDS more info in 5-6th para)
SEOUL, March 6 (Yonhap) -- South Korea hastened coordination with the United States and Japan on Monday after the North fired four missiles toward the East Sea.
Kim Kwan-jin, chief of South Korea's National S