The Venezuelan president claims that information obtained from six suspects points to the involvement of Julio Borges, an opposition leader living in exile in Colombia.
President Nicolas Maduro went on television on Tuesday night to accuse one of Venezuela's most prominent opposition leaders of being linked to a weekend attack with drones that the government called an attempt to assassinate Maduro.
Maduro said statements from some of the six suspects already arrested pointed to involvement by Julio Borges, an opposition leader living in exile in Colombia.
"Several of the declarations indicated Julio Borges. The investigations point to him," Maduro said, though he provided no details on Borges' alleged role.
Borges did not immediately comment on Maduro's accusation.
Fears of roundup
Critics of Maduro's socialist government had said immediately following Saturday evening's attack that they feared the unpopular leader would use the incident as an excuse to round up opposition politicians as he seeks to dampen spreading discontent over Venezuela's devastating economic collapse.
In the attack, two drones armed with explosives detonated near Maduro as he spoke outdoors during a military celebration. Images on live television showed Maduro and his wife looking up at the sky at one blast and then hundreds of soldiers scrambling.
Prosecutors have arrested six people who face charges of treason, attempted murder and terrorism.
The president also named opposition lawmaker Juan Requesens, seen in a video widely circulating on social media being arrested by Venezuela's political police force.
According to the opposition Requesens and his sister Rafaela Requesens, a student leader, were arrested in their Caracas apartment on Tuesday night, after President Nicolas Maduro ordered a crackdown following drone explosions at a weekend rally.
"Fourteen men of the SEBIN (intelligence agency) forcefully kidnapped lawmaker Juan Requesens and the president of the Federation of University Centers, Rafaela Requesens," the Justice First party, to which Requesens belongs, tweeted.
Requesens' sister was later released and "was in a safe place," her father said in a video broadcast on social media that was live-streamed from in front of a Caracas jail.
As elected lawmakers, Borges and Requesens enjoy immunity from prosecution under Venezuelan law.
But Diosdado Cabello, the powerful socialist party leader and president of the National Constitutional Assembly, said in a tweet onTuesday that he plans to introduce legislation stripping lawmakers of this protection.
Maduro spoke for two hours from the Miraflores Presidential Palace in a presentation using polished videos showing suspects and images of the drones exploding. One video included a purported confession by one handcuffed suspect, whose face was blurred out as they explained the plot.
Maduro also held up military hats worn by soldiers with holes in them from debris the explosion. Several soldiers seated in the audience had white bandages on their heads, apparently injured in the assassination attempt.
Maduro said he would provide evidence to officials in the United States and Colombia and ask for their co-operation handing over suspects who helped orchestrate and finance the attack.
"I want to explain to the government of the United States and the government of Colombia in detail all the evidence that leads us to accomplices and direct responsible living in the state of Florida," Maduro said. "I trust in the good faith of Donald Trump."