TAPACHULA, Mexico (AP) — An 11-year-old Egyptian girl and her 18-year-old sister were among those killed after Mexican army troops opened fire on a truck carrying migrants earlier this week, an official said Friday.

The sisters, and four other migrants from countries including Peru and Honduras, were killed on Tuesday in the southern state of Chiapas.

An official in the state’s prosecutors office confirmed the identification of the two sisters and said their father was wounded in the shooting, but survived. The official was not authorized to be quoted by name, but a second federal official confirmed that information on the same basis.

Federal officials, including newly inaugurated President Claudia Sheinbaum, again refused Friday to confirm the ages or genders of the six migrants killed in the shooting, which occurred on Sheinbaum’s first day in office.

The Egyptian embassy in Mexico and the Egyptian foreign ministry did not immediately respond to a request for comment.

Soldiers claimed they heard shots and returned fire and officials have studiously avoided saying the migrants were killed by army gunfire. However, that appears to be the case, and two soldiers have been relieved of duty and turned over to civilian prosecutors for questioning.

The killings placed in doubt Sheinbaum's statements over her first days in office that human rights will be at the forefront of her administration's policies.

Asked about her immigration policy Friday, Sheinbaum said only that the killings were under investigation and doubled down on earlier claims that the government doesn't violate human rights.

“First of all, human rights are respected,” Sheinbaum said. “That is very important, that is why it is called a humanistic immigration policy, because human rights are at the forefront.”

Three of the dead were from Egypt, and one each from Peru and Honduras. The other has apparently not yet been identified.

Ten other migrants were wounded in the shooting. but there has not been any information on their conditions.

Peru’s foreign ministry confirmed one Peruvian was killed and demanded “an urgent investigation” into the killings. Peru and Mexico have had damaged relations since a 2022 diplomatic spat.

It was the worst killing of migrants by authorities in Mexico since police in the northern state of Tamaulipas killed 17 migrants in 2021.

Sheinbaum has said the shootings are being investigated to see if any commanders might face punishment, and noted “a situation like this cannot be repeated.”

But she left out any mention of that Thursday at a ceremony at a Mexico City army base, where army and navy commanders pledged their loyalty to her in front of massed combat vehicles and hundreds of troops.

“In our country, there is not a state of siege, there are no violations of human rights,” Sheinbaum said, as she promised wage increases for soldiers and sailors.

The shootings Tuesday occurred near the city of Tapachula, near the border with Guatemala.

The Defense Department initially said that soldiers claimed to have heard shots as a convoy of three trucks passed the soldiers’ position.

The Attorney General’s Office later said all three trucks ignored orders to stop and tried to flee. The soldiers pursued them and reported coming under fire from the convoy, and returned fire.

One of the trucks eventually stopped, the driver reportedly fled, and a total of 33 migrants were found aboard, from the three countries already mentioned, as well as Nepal, Cuba, India and Pakistan.

The Defense Department said four of the migrants were found dead, and 12 wounded. Two of the wounded later died of their injuries. Sheinbaum refused to say whether any weapons were found in the migrants’ truck.

The area is a common route for smuggling migrants, who are often packed into crowded freight trucks. It has also been the scene of drug cartel turf battles, and the department said the trucks “were similar to those used by criminal groups in the region.”

Irineo Mujica, a migrant rights activist, said he doubted the migrants or their smugglers opened fire.

“It is really impossible that these people would have been shooting at the army,” Mujica said. “Most of the time, they get through by paying bribes.”

If the deaths were the result of army fire, as appears likely, it could prove a major embarrassment for Sheinbaum.

The new president has followed the lead of former president Andrés Manuel López Obrador in giving the armed forces extraordinary powers in law enforcement, state-run companies , airports, trains and construction projects.

It is not the first time Mexican forces have opened fire on vehicles carrying migrants in the area, which is also the object of cartel turf battles.

In 2021, the quasi-military National Guard opened fire on a pickup truck carrying migrants, killing one and wounding four. The Guard officers initially claimed some of those in the migrants’ truck were armed and had fired shots, but the governmental National Human Rights Commission later found that was not true.

And in 2021, state police in Tamaulipas killed 17 migrants and two Mexican citizens. Those officers also initially claimed to have come under fire from the migrants’ vehicles.

They argued they were responding to shots fired and believed they were chasing the vehicles of one of the country’s drug cartels, which frequently participate in migrant smuggling. But that later turned out to be false, and the police in fact burned the victims’ bodies in an attempt to cover up the crime.

Eleven of the policemen were convicted of homicide and sentenced to over 50 years in prison.

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Associated Press reporter Fabiola Sánchez contributed from Mexico City.

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