Mexico’s president has met with parents of 43 teachers college students for the first time since they disappeared more than a month ago after a confrontation with police in a southern city.
Investigators have charged police in Iguala turned the students over to a drug gang.
Mothers and fathers of the missing have grown increasingly frustrated at the pace of the investigation.
They were inside the Los Pinos presidential residence for more than six hours Wednesday. At one point human rights officials said the meeting had concluded but the parents were refusing to leave until President Enrique Peña Nieto signed a document that would satisfy everyone.
Felipe de la Cruz later said the parents would appear at a news conference with reporters at a human rights center in the evening.