A vocal supporter of Venezuelan President Hugo Chavez, who led a radical group who died in the street. Lina Ron, the 50th.Information Minister Andres Izar said Ron had a heart attack.
Izar Saturday mourned the death, saying on Twitter: "Honour and glory toto Lina Ron ."
Ron groups led by Chavez supporters often accuse the attacks on the opposition protests.
He founded a small Venezuelan Popular Union Party, and was a prominent voice in the movement's radical wing of the Chavez years.
Ron Chavez once said "a good woman, but she's more of anarchy."