Guaido, the head of the opposition-run assembly, has asked the global community to keep up its pressure on Maduro's government.
"We're not bluffing when we told Maduro not to do stuff like this (the kidnapping)", John Bolton, Trump's national security adviser told Univision News in an interview aired Friday.
"They have kidnapped @Robertomarrero, my chief of staff", Guaido said in a post on Twitter, adding the Caracas residences of Marrero and opposition legislator Sergio Vergara had been raided before dawn.
"We will hold Maduro and his prison officials to account for their safety and well-being", the U.S. State Department said in a statement, adding that the Citgo employees include five individuals with dual U.S. citizenship and one U.S. legal permanent resident. "Keep up the fight, don't stop and look after (Guaido)", Marrero said.
"We've revoked hundreds of Venezuelan visas - including top officials in Maduro's inner circle and their relatives, who have undermined Venezuela's democracy and prolonged the crisis". Amongst other sanctions, the United States has previously proscribed Venezuela's state-owned oil and natural gas company PDVSA in a bid to stifle funding to the Maduro regime. He also said some Venezuelan intelligence chiefs called him to say they weren't involved, in what would suggest a split in their ranks.
Maduro and Guaido both claim to be Venezuela's legitimate leader but Maduro, 56, retains the loyalty of the military brass and has control of state apparatus. He has been trying to depose the regime of President Maduro, 56, whom he has accused of wrecking the country.
Rodriguez played recordings he said were from WhatsApp conversations between Marrero and Guaido in which he said they discussed using Venezuelan funds blocked by USA sanctions to finance armed groups with the support of Colombian President Ivan Duque.
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Troops from Azerbaijan, China, Saudi Arabia, Turkey, Bahrain and Sri Lanka also took part in the parade. The Exxon Company is engaged in exploration activity in the Pakistani sea, prime minister informed.
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Muslims account for just over 1 percent of New Zealand's population. "We're not moving on". He told reporters outside that "hate speech is spreading like wildfire".
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In a statement, Venezuela's foreign ministry said it "energetically rejects the unilateral, coercive, arbitrary and illegal measures" taken by the Trump administration.
More than 40 Sebin agents raided the two homes wielding "long weapons" and searched them for three hours, Vergara tweeted.
The State Department said on the same day that "the US government today determined that persons operating in Venezuela's financial sector could be subject to sanctions".
Marrero's arrest has also triggered worldwide condemnation, with the United States (US), the European Union and Latin American nations all demanding his immediate release.
Maduro's forces have reinforced obstacles blocking a border bridge linking Venezuela and Colombia to prevent Guaido's supporters trucking in U.S. aid.
The United States and about 50 other countries recognize Guaido as the real president.
Since January, Venezuelan authorities have arrested more than 1,000 people in connection with anti-government demonstrations, rights groups have said.