Johannesburg - Czech businessman Radovan Krejcir was arrested on Friday on charges of attempted murder and kidnapping, police said.
"I can confirm that Krejcir was arrested after 6pm at his house in Gauteng," said Lt-Gen Solomon Makgale.
"He was arrested on charges of attempted murder and kidnapping."
In a statement issued later, the police said that although they did not usually name suspects before they appeared in court, "it was decided on the basis of the existence of an arrest warrant and public interest that the suspect in this instance will be identified".
A media briefing about the arrest would be held in Pretoria on Saturday.
Last Tuesday, two people died and five were injured in an explosion at Krejcir's business, Money Point, in Befordview, on the East Rand. In July, Krejcir was the target of an apparent assassination attempt outside Money Point.
Moments after he got out of his car, a remote-controlled gun installed behind the number plate of a car parked near his fired at him. Krejcir escaped unharmed.
The SA Revenue Service said last Friday that all Krejcir's assets had been placed under the control of a curator.