He will be able to get his passport back and return to Mexico.
Spain's anti-corruption prosecutor had accused the former governor of Coahuila of making transfers for 200,000 euros in 2013 to three bank accounts.
A Spanish court has ruled that a prominent former Mexican politician who was arrested on a Spanish warrant should be held in custody while officers investigate alleged corruption.
Moreira resigned in 2012 as leader of the PRI under a cloud of state government debt.
The former leader of the ruling PRI was arrested by the Prosecutor Against Corruption.
Humberto Moreira was arrested in the Barajas airport.
The suspects, a 40-year-old Iranian and a 44-year-old Swiss national, were arrested in Barcelona.
The buttons represent the emotions of love, yay, ha ha, wow, angry and sad.
The Colombian singer sang "Mi Verdad" with the Mexican band at Palau Sant Jordi in Barcelona.
Jarque, whose appointment is effective from Tuesday, replaces Juan Bejar, who signalled he would resign as CEO after Carlos Slim bought the FCC stake.