MEXICO CITY—Mexico’s federal comptroller has cleared President Enrique Peña Nieto, first lady Angélica Rivera and the country´s finance minister of conflict of interest allegations linked to purchases of property from a prominent government contractor.

Comptroller Virgilio Andrade said Friday that a six-month investigation into the controversial deals showed that the sale of luxury homes to the presidential family and to Finance Minister Luis Videgaray didn’t violate Mexican law.

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