MADRID (Reuters) -Spain has discreetly expelled at least two U.S. Embassy staff accused of bribing Spanish intelligence officers for secrets, El Pais newspaper reported on Thursday, citing government sources. There was no immediate confirmation from either country but, asked about the case, Spain’s Defence Minister Margarita Robles played down any impact on relations. She acknowledged a judicial inquiry was underway into “irregular conduct” at the CNI intelligence agency. “Spain and the United States are friends, allies and partners,” she told reporters. “When there are issues that may affect …