Kuwait's national oil company has declared a state of emergency over an oil leak in one of its southwestern oil fields. A statement by the Kuwait Oil Company did not identify the onshore oil field affected by the leak, which began on Sunday. <br/><br/>The state-run Kuwait News Agency said the leak hit the al-Maqwa field. The company said there's no sign of a toxic gas leak. It offered no details about how many barrels of oil had been spilled.<br/><br/>OPEC member Kuwait is a major oil producer. The US Energy Information Administration says Kuwait produces some 2.7 million barrels of crude oil a day and holds the world's sixth-largest oil reserves.