Police are now claiming that 31-year-old Avishai Ben David and his wife are connected to the explosive device placed in an apartment building two days ago.
The explosive device was found in an apartment in Rishon LeZion. Police also found a gun and bullets along with several other explosive devices, and claim that Ben David used the apartment, which belonged to an elderly woman currently staying in a nursing home.
It is suspected that the two arrested were hired as mercenaries by a third party.
Ben David was arrested last week along with 61-year-old Avner Harari as suspects in the celebrity-targeting bombing case. On Thursday, their remands were extended by a week.
Ben David's wife who was also arrested for involvement in the case cracked under investigation and admitted that the explosives and firearms belonged to her and her husband, who then admitted to it as well.
Judge Ido Druyan stated that the investigation is moving impressively fast, saying that in addition to the mounting evidence, new information is being revealed daily.
Harari claims that his arrest was carried out to appease populist demand. "The police are using me for rating, like a gimmick," he claimed. "My hands are clean and I have no involvement in anything. I'm on my way to an (photo) album. That's what's important," Harari joked, commenting on the amount of pictures the media took of him over the past few days.