Caracas, Venezuela ? President Hugo Chavez demanded 20-year prison terms Friday for two prominent opponents who directed a nationwide strike that devastated Venezuela’s oil-based economy.

Carlos Fernandez, head of Venezuela’s largest business chamber, and Carlos Ortega, leader of its biggest labor confederation, are charged with treason and other crimes for the two-month strike, which cost more than $4 billion.

Fernandez was arrested by secret police Wednesday and hauled into court Friday. Ortega went into hiding when a judge issued an arrest warrant.

Thousands protested Fernandez’s arrest in the western oil city of Maracaibo. Hundreds more rallied in Caracas and blocked a highway.

“These oligarchs believed that they were untouchable. There are no untouchables in Venezuela. A criminal is a criminal,” Chavez thundered during a ceremony handing land titles to peasants in Trujillo state.

He demanded a 20-year term for Fernandez, president of Fedecamaras, and for Ortega, of the Venezuelan Workers Confederation, for allegedly sabotaging the oil industry, inciting civil disobedience “and trampling the human rights of the Venezuelan people.”

Venezuelan national guard soldiers stand at the main entrance of the court where general strike leader Carlos Fernandez was expected to arrive Friday in Caracas. Thousands protested Fernandez's arrest across the country, and nine people were injured Thursday in clashes with police in the central city of Valencia.

The treason charge could result in a 20- to 26-year prison term.

Oil is Venezuela’s strategic industry, and its exports were the fifth-largest in the world before the strike began Dec. 2. The strike ended Feb. 4, but Chavez’s government is battling a continuing walkout in the oil industry.

Citing nationwide hardship caused by gasoline shortages, Chavez condemned Fernandez and Ortega as “terrorists” who failed to topple his government — both during a brief April coup and this winter.

A judge was to decide today if Fernandez should remain in custody pending trial.