Security forces told them they were being picked up from their residences in Caracas to do medical checks, one of their relatives told CNN on Saturday.

In the video posted by his family after the detention, Pereira said, "We are here recording this video because at this time we and our families are very worried."

He added that the Venezuelan government had already retaliated against the CITGO 6 in 2019 when it revoked their house arrest.

"If we're taken into custody again, it would be under the worst conditions possible given that the SEBIN is now managed by the Ministry of Prisons.

I want to record this testimony because I'm very worried," he said in the video.

Veronica Vadell, daughter of CITGO 6 member Tomeu Vadell, told CNN her father texted the family to warn them he was being picked up.

"The fact that Saab is in the US before our father is an absolute disgrace," she said.