The families of nuclear scientists from Iran who were assassinated in 2010 have filed a lawsuit against Israel, the U.S. and Britain, saying the countries are responsible for the deaths 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, said the families are demanding those behind the killings should be brought to justice.