Members of Venezuela's ruling socialist party selected candidates to compete in December's legislative elections that the opposition is favored to win amid a punishing economic crisis that is eroding support for President Nicolas Maduro.

National Assembly President Diosdado Cabello said that more than 3 million party loyalists partook in Sunday's primary and that the vote count was double the number cast for opposition candidates in the 33 districts where it held primaries last month.

But the National Electoral Council didn't provide any turnout figures and opposition groups said abstention was high.

Among the 110 candidates chosen to represent the United Socialist Party in the legislative vote was a brother of the late President Hugo Chavez, several ex-cabinet members and a number of minor celebrities.