U.S. oil major Chevron Corp. said it has cut the numbers of its overseas staff working in the Kurdish region of Iraq as the militant group Islamic State pushed their offensive closer to the area, and amid reports of a car bomb blast in the nearby northern Iraqi city of Kirkuk. Chevron’s move comes as shares in Kurdistan-focused oil producers listed in Europe plunged on Thursday. “We are closely monitoring the situation,” a Chevron spokeswoman in London said. “We have reviewed the business critical positions and as a consequence made a reduction in the total numbers of expatriates in the region.” Exxon Mobil is also evacuating staff from Kurdistan, Reuters reported Thursday, citing an industry source. A spokesman for the company said it doesn’t comment on security matters. Shares in London-listed Gulf Keystone Petroleum Ltd fell as much as 13%—to their lowest level since 2010—after the Islamic State captured […]