GRAND BLANC TOWNSHIP, Mich. — A gunman opened fire inside a Church of Jesus Christ of Latter-day Saints chapel in Michigan during a Sunday service and set the building ablaze, killing at least four people and injuring eight others. Police shot and killed the suspect, authorities said. After the suspect left the church, two officers pursued him and “engaged in gunfire,” the chief said. Local authorities said the FBI was sending 100 agents to Grand Blanc Township, a community of roughly 40,000 people outside Flint. The church building, circled by a parking lot and a large lawn, is near residential areas and a Jehovah’s Witness church.