Venezuelan intelligence agents have detained a senior two opposition leader Juan Guaidó after raid on his Caracas home, say legislators
Mr Guaidó has demanded the immediate release of his chief of staff Roberto Marrero, whose whereabouts are unknown.
The nearby home of opposition legislator Sergio Vergara was also raided. He was not arrested.
The operation could signal a crackdown on the opposition by embattled President Nicolás Maduro.
Mr Guaidó, head of the opposition-controlled National Assembly, declared himself interim leader on 23 January, says Mr Maduro's re
- On Twitter, he said Mr Marrero had been "kidnapped" and that "Two rifles have been planted" at his home's home during the raid at about 2:00 am local time (6:00 GMT).
Mr. Vergara, who lives in the same building, said more than 40 heavily armed officers from intelligence agency Sebin took part in the raids on the two apartments. Mr Vergara added that his driver had also been detained.
Venezuela's Information Ministry has not commented.
What's the background?
The raids come at a moment of high tension in the country, with Mr Guaidó and Mr Maduro 
Shortly after Mr Guaidó declared himself interim leader, his assets were frozen and the Supreme Court, dominated by government loyalists, placed a travel ban on him.
But the 35-year-old opposition leader defied that last month when he toured Latin American countries Mr. Guaidó has continued to call for President Maduro to step aside and urged the security forces, which have mainly been loyal to the government,
Last week, the chief prosecutor said it had asked the Supreme Court to investigate Mr Guaidó for allegedly abusing the country's electrical system in the wake of this month's power cuts.
Mr Guaidó has been recognized as leader at more than 50 countries, including most in Latin America and the US. Mr. Maduro, who still has the support of China and Russia, accuses the opposition of being part of a US orchestrated coup.