South Korea's imports of Iranian crude doubled in March from a year earlier but the country's oil shipments from Iran in the first quarter of this year fell 16% y/y.Seoul imported 134,857 barrels per day of crude oil from Tehran last month. Iranian crude shipments in 2014 were 124,497 bpd, down 7.1% from the 2013 average of 134,000 bpd, Reuters reported.