Prosecutors in Mexico have opened a corruption investigation against former President Enrique Peña Nieto.
It comes after Emilio Lozoya, the ex-head of the state energy firm, accused Mr. Peña Nieto of taking millions of dollars in bribes and bribing MPs.
Mr. Lozoya was extradited from Spain last month to stand trial on corruption charges linked to Brazil’s construction giant Odebrecht.
Mr. Peña Nieto, who was in office in 2012-18, has so far made no comments.
Last year, a witness testifying at a US trial of Mexico’s drug cartel kingpin Joaquín “El Chapo” Guzmán said Mr. Peña Nieto had accepted a $100m (£77m) bribe from the mobster.
The ex-president also made no comments on that allegation, but he has previously rejected allegations of corruption.
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