Venezuela’s Supreme Court has asked for opposition leader Juan Guaidó to be stripped of his parliamentary immunity, a move that could lead to his jailing.
The pro-government Constituent Assembly is expected to back the request.
Mr Guaidó declared himself interim leader in January, gaining the support of more than fifty countries including the US.
But President Nicolás Maduro has major allies too and retains the crucial backing of the military.
Amid a power struggle between the two, Venezuela has seen growing street protests over lack of water and electricity.