Mexico's attorney general sought an arrest warrant for former Foreign Minister Luis Videgaray in a case involving scandal-plagued Brazil construction firm Odebrecht, but was blocked by a judge, President Andres Manuel Lopez Obrador said on Tuesday. Videgaray and other high-ranking politicians under Lopez Obrador's predecessor were accused of corruption in the deposition, leaked in August, of a former chief executive officer of Mexican national oil company Petroleos Mexicanos. The deposition, whose authenticity is not in dispute, alleges they used bribes from Odebrecht to finance political campaigns and influence lawmakers to support a reform of Mexico's jealously guarded energy sector.