Iran's judiciary sentenced Iranian-German national Jamshid Sharmahd to death on charges of "corruption on earth", the judiciary's Mizan news agency reported on Tuesday.
Sharmahd, who also has U.S. residency, is accused by Iran of heading a pro-monarchist group accused of a deadly 2008 bombing and planning other attacks in the country.
"His verdict can still be appealed in the supreme court," the agency added.
Sharmahd's arrest was announced in 2020 through an intelligence ministry statement that described him as "the ringleader of the terrorist Tondar group, who directed armed and terrorist acts in Iran from America."
Based in Los Angeles, the little-known Kingdom Assembly of Iran, or Tondar, says it seeks to restore the Iranian monarchy that was overthrown by the 1979 Islamic revolution. It runs pro-Iranian opposition radio and television stations abroad.
(Reporting by Elwely Elwelly, Editing by William Maclean and Michael Georgy)