KABUL, Afghanistan (AP) — The three top officials in Afghanistan’s Kandahar province were killed when their own guards opened fire on them at a security conference Thursday, the deputy provincial governor said, and a Taliban spokesman said the target was Washington’s top general in Afghanistan, Gen. Scott Miller, who escaped without injury, according to NATO. Agha Lala Dastageri, Kandahar’s deputy provincial governor, said powerful provincial police chief Abdul Raziq was among the dead, along with Kandahar Gov. Zalmay Wesa, who died of his wounds at a nearby hospital. Dastageri said provincial intelligence chief Abdul Mohmin also died inside the governor’s...