But Attorney General Jesus Murillo Karam warned that it would be difficult to identify the charred remains and that authorities will continue to consider the students as missing until DNA tests confirm the identities.
"I am angry, sad and Mexican society is too," said Murillo Karam yesterday, who delivered the news in a meeting with relatives of the missing in an airport hangar in Chilpancingo, capital of the violence-plagued southern state of Guerrero.
The three suspects said the students were killed after they were handed over to them between Iguala and the neighboring town of Cocula by police linked to the Guerreros Unidos drug gang, Murillo Karam said.
The bodies were set on fire with gasoline, tires, firewood and plastic in an inferno that lasted 14 hours, he said.
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"The fire lasted from midnight to 2:00 pm the next day. The criminals could not handle the bodies (for three hours) due to the heat," he said.
The suspects were not sure how many students they received but one of them said there were more than 40.
Before the announcement, relatives of the missing said they would not accept that their children were killed until they get the results of independent Argentine forensic experts.
Murillo Karam said the remains would be analyzed by experts in an Austrian university.
Dozens of people have been arrested, including Guerreros Unidos members, 36 Iguala and Cocula police officers and Iguala's ousted mayor, Jose Luis Abarca, and his wife Maria de los Angeles Pineda.