A Cuban migrant held in solitary confinement at an immigration detention facility in Texas died after guards held him down, according to an autopsy report released Wednesday that ruled the death a homicide.

The Columbia Heights School District in Minnesota says four of its students have been detained by ICE agents over the past two weeks.

Geraldo Lunas Campos' cause of death was "asphyxia due to neck and torso compression," stated the autopsy report released by the medical examiner on Wednesday, Jan. 21.