Investigators search Opel premises in diesel probe

FRANKFURT — Prosecutors say law enforcement officials have conducted searches at German automaker Opel as part of an investigation into suspected manipulation of diesel emissions. The DPA news agency reported that investors went to company facilities Monday in Russelsheim and Kaiserslautern. Nadja Niesen, a spokesperson for prosecutors in Frankfurt, was cited by DPA as saying investigators suspect Opel may have used software to turn off emissions controls at certain engine speeds and temperatures.