The suspects include a man considered the mastermind of the escape, the capo's brother-in-law and an airplane pilot.
The search for the world's most wanted drug lord has focused in recent weeks on a rugged area that stretches from Sinaloa into neighboring Durango state.
Officials think the drug lord injured a leg and his face in evading capture.
Almost all of them are believed to be in custody.
New evidence shows that they did not follow protocol.
A federal official said Thursday that court hearings would be required before the extradition could ever be carried out.
This shop in the northeastern Mexican city of Reynosa, just across the Rio Grande from Texas, has been carefully crafting piñatas bearing Guzman's likeness, including a gun-framed sunglasses and his distinctive moustache.
Mauricio Ochmann made a joke and got more than a million likes
Italian Alexsandro Palombo turns him into a cartoon.
Arely Gómez, procuradora General de la República, realizó un recorrido al interior del Cefereso 1, donde reiteró la instrucción de poner especial atención en el desarrollo de las diligencias; también entrevistó a vigilantes del penal