Crude oil production in the major Gulf Arab exporters plunged in March due to the Iran war, according to data released by OPEC on Monday. Iraq took the biggest hit with production collapsing 61% from 4.2 million barrels per day in February to 1.6 million bpd in March, according to OPEC's monthly report . Output plunged 53% in Kuwait and 44% in the United Arab Emirates month over month, the data showed. Production in Saudi Arabia, OPEC's biggest producer, dropped 23% from 10.1 million bpd to 7.8