Venezuela’s Supreme Court has banned opposition leader Juan Guaidó from leaving the country and frozen his bank accounts.
The move comes amid an escalating power struggle, after Guaidó declared himself interim president last week.
He has been backed by the US and other countries. President Nicolás Maduro has major allies too, including Russia.
Maduro said in an interview that he was prepared to hold negotiations with the opposition.
The opposition has asked supporters to take part in a two-hour peaceful protest on Wednesday.
It is as yet unclear if Guaidó will attend.
A group of North and South American countries has meanwhile opposed any outside military involvement in the country.
Peru’s Foreign Minister Nestor Popolizio said the Lima Group – a 14-country body including Canada set up in 2017 to find a peaceful solution to the crisis in Venezuela – was opposed to “military intervention”.