The bodies of eight Mexican tourists, who were accidentally killed by Egyptian forces over a week ago, have been sent back to Mexico to undergo forensic investigation.

As reported by AFP, the foreign ministry and the attorney general's office jointly stated that the bodies arrived on a commercial flight after a layover in Amsterdam. After undergoing forensics, they will be given to their families.

The tourists were killed on Sep. 13, when Egyptian forces mistakenly took them for terrorists and attacked their convoy in Egypt’s Western Desert. Aside from the dead, six Mexican tourists were wounded in the incident.

The six wounded tourists returned to Mexico on Sept. 18, according to a government press release. They were airlifted to a specialized hospital after landing. 

The tragic occurrence has become a difficult diplomatic situation. Mexican President Enrique Peña Nieto relayed his anger over the situation to Egyptian President Abdel Fattah al-Sisi over the phone last week. Peña Nieto has called for a full investigation and wants Cairo to compensate the victims and their families for their loss.

Mexico’s foreign minister, Claudia Ruiz Massiu, flew to Cairo immediately after the incident, according to the Guardian. “We face a terrible loss of human lives and an unjustified attack that obligates us to make the protection of our citizens the priority,” Massiu said.

In an interview published this past Sunday in the Mexican newspaper El Universal, Yasser Shaban, the Egyptian ambassador to Mexico, said that he was unable even to confirm the army was actually behind the attack that killed the eight tourists outside of Cairo.

"I can not assure right now that Egypt's army, that was carrying out an operation in the area, is responisble for the attack," he said. The ambassador did, however, go on to describe Mexico as a wonderful nation, offered his condolences to the bereaved families, and wished the wounded a speedy recovery.