菲律宾国家电网公司（NGCP）已要求菲律宾国家警察调查伊利汉至塔亚巴斯（Ilijan-Tayabas）500千伏输电线路可能遭受的破坏活动。此前，该线路发生导线断裂，导致了大规模电力中断。
在日期为2026年5月15日的一封信函中，NGCP报告称该线路于5月13日上午6:30左右跳闸。经查，位于八打雁市Haligue Silangan村的129号和130号塔架之间的导线断裂，导致相关电厂约1700兆瓦的电力供应中断。
此次事故加剧了电力储备的紧张，并引发了吕宋岛和米沙鄢群岛的红色和黄色预警。NGCP的检查人员认定，该受损情况与正常磨损或自然原因不符，导线在间隔棒之间有明显的被蓄意切割痕迹。
该线路此前未发现任何缺陷。NGCP表示，为保护输电网络，需要执法部门协助进行全面调查。
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