Mexico's Attorney General announced the arrest of the leader of a criminal cartel that could lead to finding the 43 missing students.

Mexican authorities arrested on Friday Sidronio Casarrubias, leader of the criminal gang Guerreros Unidos (United Warriors), which allegedly participated in the disappearance of 43 Mexican students on September 26.

Mexico's Attorney General Jesus Murrillo Karam announced the capture in a press conference. He said Casarrubias was arrested along with a collaborator, and weapons and vehicles were seized.

Murillo Karam said that the arrest was "the beginning of a new route of investigation that can lead us more quickly and easily to the truth.”

United Warriors is a criminal gang dedicated to extortion, robbery, and murder. The gang split from Beltran Leyva Cartel, once one of the most powerful drug cartels in Mexico.

The gang was accused by Mexican authorities of the disappearance of the students, along with the local police of the city of Iguala, Guerrero, one of the poorest Mexican states.

On the night of September 26, local police agents shot at several buses taken by the students in Iguala. Three of the students died, along with another three civilians. Then the agents kidnapped 43 students and handed them over to the United Warriors, according to authorities.

The case has undermined President Enrique Peña Nieto's pledge to restore order to Mexico. Drug violence exploded during the rule of his predecessor, Felipe Calderon, and has claimed about 100,000 lives since 2007. In the first two years of Peña's administrations more people have been killed than during the first two years of his predecessor.

Since the disappearance of the students authorities have found some 10 mass graves near Iguala, with more than 28 burned bodies in them. According to Mexican officials, none of the corpses belong to the students.