During a Friday demonstration against the 2014 disappearance of 43 students, protesters ??hurling stones and homemade explosive devices clashed with security forces at a Mexican military base.

Hundreds of protesters, some shouting “killers,” tore down metal fences and attempted to enter Military Camp No. 1 in Mexico City at the recent event marking the eighth anniversary of the tragedy.

The authorities then fired water cannons.

The confrontation came a day after around a dozen police officers were injured during a protest outside the attorney general’s office to demand justice for the students.

And on Wednesday, relatives organized a rally outside the Israeli embassy demanding the extradition of Tomas Zeron, a former top investigator wanted in connection with one of the country’s worst human rights tragedies.

The 43 student teachers had seized buses in the southern state of Guerrero to go to a demonstration in Mexico City before disappearing.

Investigators say they were arrested by corrupt police and handed over to a drug cartel who mistook them for members of a rival gang, but what exactly happened to them is disputed.

Last month, a truth commission charged by the current government with investigating the atrocity branded the case as a “state crime” involving agents from various institutions.

Military personnel, either directly or negligently, bear a “clear responsibility.”

Arrest warrants have been issued for more than 80 suspects, including military personnel, police officers and cartel members.

Former Attorney General Jesus Murillo Karam, who led a controversial investigation into the mass disappearances, was arrested last month on charges of enforced disappearance, torture and obstruction of justice.