Alex Cifuentes, who says he was a close associate of Guzmán for years, told a New York City courtroom that he had told authorities of the bribe in 2016.

Guzmán is accused of being behind the Sinaloa drug cartel, which prosecutors say was the largest US drug supplier.

Mr Peña Nieto served as the president of Mexico from 2012 to 2018.

Guzmán, 61, has been on trial in Brooklyn since November after he was extradited from Mexico to face charges of trafficking cocaine, heroin and other drugs as leader of what the US has called the world's largest drug cartel.

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