Migrants deported from the US, and even “dangerous” American citizens convicted of heinous crimes could be headed to a notorious hellhole prison in El Salvador, where inmates live in over-crowded cells and rival gang members fight to the death over food and water.

The Terrorism Confinement Center (CECOT) has been hailed as the Central American nation’s solution to rampant gang violence, but human rights groups says the 15,000 inmates face inhumane treatment — and up to a third are believed to be innocent.

After a meeting between Secretary of State Marco Rubio and Salvadoran President Nayib Bukele in San Salvador Monday, Rubio announced that the mega prison could begin accepting inmates from the US.

“We can send them and he will put them in his jails,” Rubio said of migrants set to be deported from the US.

He added: “And, he’s also offered to do the same for dangerous criminals currently in custody and serving their sentences in the United States even though they’re US citizens or legal residents.”