National Petroleum Authority, Ghana

Caltex Australia Limited, the nation’s biggest oil refiner, said its Kurnell plant in southern Sydney operated normally as a propane leak from a gas pipeline prompted the removal of some workers. Emergency services are at the site and the propane pipeline is being depressurized after the “small leak,” Felicity Wilson, a Sydney-based spokeswoman for Caltex Australia, said by telephone. The leak was discovered around 9 a.m. on Tuesday. The oil and lubricating refineries at the site have not been shut down, she said. Kurnell, the biggest of Caltex Australia’s two refineries, has the capacity to process about 135,000 barrels of crude a day. The refinery is one of seven in the country, with others operated by Royal Dutch Shell Plc, Exxon Mobil Corp. and BP Plc. Caltex Australia, half-owned by Chevron Corp., also operates the Lytton plant in Queensland state.