Exxon pulls offshore workers; Shell, Chevron cut output due to Alberto

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Exxon Mobil Corp evacuated non-essential workers from the Lena production platform in the Gulf of Mexico ahead of Subtropical Storm Alberto, the company said on Sunday. Royal Dutch Shell Plc and Chevron Corp shut production on platforms in the eastern Gulf of Mexico due to Alberto and evacuated workers from those sites, the companies said. The U.S. National Hurricane Center said Alberto was transitioning to a tropical cyclone as its circulation became more focused around a central core located 135 miles (220 km) west of Tampa, Florida, with 50 mile per hour winds (85 kph).