RABAT: At least 23 migrants who died last month in a mass attempt to enter the Spanish enclave of Melilla from Morocco likely 鈥渟uffocated,鈥� Morocco鈥檚 state-backed CNDH rights group said.

The death toll after around 2,000 people, many from Sudan, stormed the frontier on June 24 was the worst in years of attempted migrant crossings into Spain鈥檚 Ceuta and Melilla enclaves, which have two of the EU鈥檚 only land borders with Africa.

Adil El-Sehimi, a doctor who examined the bodies during a CNDH fact-finding mission, said the migrants had most likely died of 鈥渕echanical asphyxiation,鈥� when a force or object prevents a person from breathing.

CNDH chief Amina Bouayach said 23 migrants had died in the incident, confirming the official toll.

None of the dead have been buried and autopsies were pending, Bouayach told a press conference in Rabat to present the initial findings of the CNDH probe.

Spanish rights group Caminando Fronteras says as many as 37 people lost their lives.

Five days after the incident, Human Rights Watch (HRW) cited 鈥渞eports that the authorities in Morocco may be organizing hasty mass burials,鈥� along with photographic evidence of recently dug graves in nearby Nador.

The CNDH said large numbers of migrants, 鈥渁rmed with sticks and stones ... split into two groups: The first stormed a border post closed since 2018 and the second climbed nearby walls topped with barbed wire.鈥�

It said that the dead had been crushed in part of a border post, where manual turnstiles allow the passage of a single person at a time.

鈥淎 large number of migrants found themselves crammed into this narrow area, resulting in jostling which led to migrants suffocating,鈥� it said.

The UN, the African Union and independent rights groups have denounced the use of excessive force by Moroccan and Spanish security personnel.

HRW said a video showed a Moroccan security agent 鈥渂eating obviously injured men prone on the ground and another agent throwing a limp body onto a pile of people.鈥�

The CNDH defended Moroccan forces鈥� actions, saying such cases were 鈥渋solated鈥� and citing the danger posed by 鈥渢he large number of migrants鈥� carrying sticks and stones.

鈥淟aw enforcement did not use any firearms,鈥� it added.

Also Wednesday, the trial opened in Nador of a group of 29 migrants, including a minor, accused of 鈥渋llegal entry onto Moroccan territory鈥� as well as 鈥渧iolence against law enforcement officers鈥� and 鈥減articipating in a criminal gang with a view to organizing and facilitating鈥� irregular migration.

The prosecution presented 鈥渕edical certificates of members of the security forces hurt during the clashes. The judge decided to summon them,鈥� said Khalid Ameza, a lawyer for the accused.