CORRECTED (OFFICIAL)-Spanish police say they arrested a Mexican national, but not Pemex former chief Lozoya

Spanish police on Wednesday said they arrested a Mexican national the day before, but that it was not the former chief of Mexico's state oil firm Pemex, Emilio Lozoya, as they had said previously.

A police spokeswoman declined to give the identity of the person arrested. A spokesman for the police had earlier told Reuters that Lozoya had been arrested. The Mexican Finance Ministry's money-laundering czar Santiago Nieto said on Tuesday that the Financial Intelligence Unit he leads had presented the attorney general's office with three charges against Lozoya related to "acts of corruption" committed when he was at the helm of Pemex.

The Mexican attorney general's office had said that Alonso Ancira, the chairman of steelmaker Altos Hornos de Mexico, was arrested in Spain on Tuesday.