TEHRAN, Iran >>  Families of Iran’s slain nuclear scientists have filed a lawsuit against Israel, the U.S. and Britain accusing them of involvement in the assassination of their loved ones.

Rahim Ahmadi Roshan, father of Mostafa Ahmadi Roshan, the slain chemistry expert and a director of the Natanz uranium enrichment facility in central Iran, told a press conference in Tehran Wednesday that the families have demanded Iran’s judiciary to pursue their complaint through international bodies and bring those behind the killings to justice.

“We’ve filed an indictment against the Zionist regime and the arrogant powers,” Roshan told reporters.”(The judiciary) is to pursue this case with the relevant international bodies.”

Iran’s state television broadcast purported confessions earlier this month by 14 suspects in connection with the killing of five nuclear scientists since 2010.

The TV also showed pictures from a military garrison it said was a training camp outside Tel Aviv in Israel. It said the suspects took courses there, including how to place magnetic bombs on cars — the method used in the killing of the scientists.

The suspects also acknowledged in the purported confessions that they received training in Israel.

Iran says the attacks are part of a covert campaign by Israel and the West to sabotage its nuclear program, which the U.S. and its allies suspect is aimed at producing nuclear weapons. Iran denies that.

Iran has blamed Israel’s Mossad as well as the CIA and Britain’s MI6 for the assassinations, with support from some of Iran’s neighbors. The U.S. and Britain have denied involvement in the slayings. Israel has not commented.