Venezuela opposition leader says family threatened by Maduro agents

The move heightened fears for the security of the 35-year-old National Assembly leader, who declared himself acting president last week in a direct challenge to Maduro's authority.

The police's special action force, FAES, had visited his home to interview his wife Fabiana Rosales, Guaido told his audience during a speech at Caracas university.

"The FAES is at my house, asking for Fabiana. At this moment the dictatorship believes that it will intimidate us," a confident Guaido said, his wife at his side.

Several opposition leaders have been jailed in recent years as Maduro cracked down on growing dissent in the Latin American country.

Earlier, European lawmakers recognized Guaido as the acting head of state -- another step forward in his bid to force out the socialist leader who has presided over the oil-rich country's economic collapse.

While marshaling international support, Guaido is seeking to maintain street pressure against Maduro at home, where he has called more mass protests for Saturday -- keeping him firmly in the government's crosshairs.

Venezuela's Supreme Court -- dominated by regime loyalists -- have frozen his assets and ordered him not to leave the country.

On Thursday, lawmakers at the Brussels-based European Parliament voted to accept Guaido as "legitimate interim president of the country" -- and urged the European Union to follow suit.

Four major European powers -- Britain, France, Germany and Spain -- have said they would do so if Maduro fails to call fresh presidential elections by the weekend. The US on Thursday urged all European countries to recognize Guaido.

With his wife at his side on the podium, Guaido said he had a 20-month old daughter at home and would be holding FAES accountable for "whatever they do to my baby."

"The objective is obvious... I tell these officials, do not cross the red line," he said.

The United States, which immediately recognized Guaido along with a dozen Latin American countries, has warned Maduro of "serious consequences" if he targets opponents.

Organization of American States chief Luis Almagro denounced the "intimidation" of Guaido.

The university speech came one day after thousands of people led by Guaido took to the streets in Caracas and various other cities, banging pots, blowing whistles and horns, and carrying banners that read: "Armed forces, regain your dignity" and "Maduro usurper."

The two-hour strike was called to press demands "that the armed forces side with the people" -- which Guaido himself said is "crucial to enabling a change in government." Maduro supporters have matched the protests with counter demonstrations.

The last 10 days of political upheaval have exacerbated the general disarray in Venezuela, which has the world's largest proven oil reserves but has suffered an economic meltdown marked by hyperinflation and shortages of basic necessities.