The US embassy in Mexico said on Friday that Joaquin Guzman Lopez, the son of the infamous cartel kingpin known as "El Chapo," had surrendered voluntarily while his father's former partner Ismael "El Mayo" Zambada seemed to have been taken against his will.
The murky circumstances leading to the Sinaloa Cartel members' US arrest last month caused Mexico's president to reproach its neighbor for lack of cooperation. But the embassy said neither the plane, pilot or personnel involved were US "resources."
The flight plan of plane used to carry them from Mexico was not shared with US authorities, the embassy added.