(2nd LD) PM arrives in Russia's Vladivostok for economic forum
(ATTN: RECASTS dateline, headline, lead; ADDS more info in last 3 paras) VLADIVOSTOK/SEOUL, Sept. 10 (Yonhap) -- Prime Minister Lee Nak-yon arrived in Vladivostok on Monday to attend an annual international economic forum and hold meetings with Russia