AP News in Brief at 12:04 a.m. EDT

Federal investigators are probing Amazon cargo jet's fiery runway crash in Miami that killed five people onboard. The victims were all inside a van carrying seven employees from a cleaning company, with an SUV colliding outside the airport premises. National Transportation Safety Board Chairwoman Jennifer Homendy described the crash site as "utter devastation."

She walked the route the Boeing 767 took, pointing out tire marks, the van, torn fencing, navigational equipment, and crushed SUV. The debris field was extensive and difficult for responders. Midterm elections are in full swing, with candidates hitting Labor Day events to rally support. Troy Jackson, a labor activist and Democratic nominee for U.S. Senate in Maine, emphasized the need for higher minimum wage, expanded family medical leave, and unity among workers.

Meanwhile, Iran announced the development of a new ballistic missile with improved capabilities, boasting of its ability to take preemptive action against any threat.