______________________________________ The authorities in the Mexican State of Sonora said the spill only came to light the next day when residents downstream noticed the river had turned orange. Water supplies to some 20,000 people have been cut off. The military in Colombia says it's sending more troops to the eastern province of Arauca to deal with a recent wave of attacks. The announcement comes hours after a local politician was shot dead and eight soldiers were injured by an explosive device. _________________________________________墨西哥索诺拉当局表示,当第二天当地居民发现河水已经变成橙色时,污染事件才得以曝光.大约2万人的供水已经被切断. 哥伦比亚军方表示已经派送更多军队力量到东部阿劳卡省处理近期发生的多次袭击事件.公告在袭击事件发生后发出,袭击已造成当地一名政治家被枪杀,八名士兵被炸弹装置炸伤.
officials in northwest Mexico say a private company may send polution accident last week did not inmediatly alert authoriaty and large quantity of toxic chamical were spinling to river.