Kimberly Breier, the United States assistant secretary of state for Western Hemisphere affairs, said on Twitter earlier Wednesday that the State Department was aware of Mr. Weddle’s arrest and demanded his “immediate release, unharmed.”

Mr. Weddle and Mr. Camacho joined dozens of journalists, both local and foreign, who have been detained in recent weeks in Venezuela.

The arrests came a week after the Mexican-American journalist Jorge Ramos was detained at the presidential palace after a confrontational interview during which he asked Mr. Maduro about the erosion of democracy and human rights in Venezuela, a once wealthy country whose economy has unraveled under Mr. Maduro’s rule.

“There are increasingly brazen tactics being used, and that speaks to the continued disregard on the part of Maduro and other Venezuelan state agencies for press freedom and the safety of journalists,” said Natalie Southwick, the Central and South America program coordinator at the Committee to Protect Journalists. “There is a lack of respect for the rights of journalists and the work they are doing in the country.”

It has not been uncommon in recent years for foreign journalists to be arrested and deported for not having a visa that grants them permission to live and work in Venezuela, but that is not the case for Mr. Weddle. According to his most frequent freelance employer, the South Florida television network WPLG, he has permission to live and work in the country.

“It is our understanding that he is living and working in Venezuela legally and has been doing so for the past four years,” E. R. Bert Medina, the network’s president, said in a statement. “Cody has been dedicated and committed to telling the story in Venezuela to our viewers here in South Florida.”

In a brief message on Facebook, Mr. Weddle’s mother said her son had told her that he had a visa granting him residency in Venezuela for five years.