Some of the Venezuelans detained in El Salvador's notorious Cecot prison have alleged physical assault, sexual abuse and torture.

Venezuela announced a probe into torture claims by migrants the US sent to a Salvadoran prison, where they said they were beaten, abused, and fed rotten food.

Venezuela says it is opening a formal investigation into several Salvadoran officials, including President Nayib Bukele, over the alleged abuse of Venezuelan migrants deported from the US.