Mexico expects a complete and transparent investigation into the mistaken killing of a group of Mexican tourists on a safari trip in Egypt on Sunday, Mexico's foreign minister Claudia Ruiz Massieu said in a joint press conference on Wednesday with her Egyptian counterpart Sameh Shoukry.

"We want to determine the circumstances that led to that unprecedented and unfortunate incident. We were clear in our discussions on that matter, as well the necessity of returning the Mexican injured and dead home as soon as possible," Massieu said.

She expressed condolences to both the Mexican and the Egyptian people after citizens of both nations died.

Eight Mexicans were killed according to Mexican officials, among 12 who lost their lives and 10 who were wounded on Sunday when Egyptian security forces fired on a group of tourists and guides after mistaking them for terrorists.

Massieu also said her talks with Egyptian officials were limited to the killing and subsequent developments.

Asked about the details of the incident and the media debate regarding whether the tourist company had a permit or not, she said the injured told her the tour was supposed to last for 15 days and that the tourist agency told them it had obtained all the necessary permits.

The Mexican foreign minister also thanked the Egyptian government for its cooperation following the fatal attack and for accepting the Mexican government's requests concerning medical treatment for the injured.

Egypt's foreign minister Sameh Shoukry refused to comment on the ongoing investigation into the incident.

The two ministers issued a joint statement saying the investigation would be thorough and would determine the circumstances of the fatal incident.

Claudia Ruiz Massieu had arrived at Cairo International Airport on Wednesday morning with six Mexican diplomats and 19 family members of the tourists on Mexico's presidential airoplane.

The Mexican foreign minister has met with Egypt's president Abdel-Fattah El-Sisi and also visited some of the injured Mexican tourists in Dar Al-Fouad Hospital in Giza.