The change was announced amid backlash over the school's handling of gang rape allegations involving a fraternity on campus.

The collision involving a Robinson R22 and an Airbus helicopter occurred on Thursday afternoon, with both aircraft crashing in a field adjacent to a highway.

Machado, who was in exile for nearly a year, said the transition in Venezuela's government would be "irreversible, organised, pacific".

The PM's Likud party has alleged foreign interference and said Arab-led parties "stole" the election after his coalition lost its majority.

The leaked tapes appear to show one high-speed train was given clearance to move at normal speed, even though another up ahead had stalled.

The defeated presidential candidate says he will lead the opposition from the US.