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.

The more than 200 Venezuelan migrants who were deported by the Trump administration to El Salvador's mega-prison in March have left El Salvador to be sent to Venezuela as part of a prisoner swap that included Americans being held in Venezuela, El Salvador President Nayib Bukele announced on X.

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