Kilmar Abrego Garcia claims that he was tortured after being mistakenly deported to an El Salvadoran mega prison by the Trump administration.

Lawyers for Mr Abrego Garcia, 29, who entered the US illegally, said the married father was subjected to “severe beatings”, “sleep deprivation” and “psychological torture” while incarcerated.

The new details of Mr Abrego Garcia’s time in El Salvador’s Terrorism Confinement Centre (Cecot) were added to a lawsuit against the Trump administration filed by his wife, Jennifer Vasquez.

The Trump administration has asked a federal judge in Maryland, where Mr Abrego Garcia was living before his arrest in March, to dismiss Ms Vasquez’s lawsuit, arguing that it is now moot because the government returned her husband to the US, as ordered by the court.

His case became a flashpoint in a national debate about Mr Trump’s border crackdown, sparking outrage from Democrats who held it up as evidence of the cruelty of the president’s mass deportation programme.