Eduardo Noriega is set to star in ambitious new action-packed Spanish thriller Lobo, which was presented on Sept 23 at the Donostia-San Sebastian International Film Festival.

If Julio Medem's documentary has not brought enough attention to the situation in Basque Country following its San Sebastian screening on Sunday, Lobo looks set to.

The film is based on the real-life story of a Spanish secret agent who infiltrated the militant Basque separatist group ETA between 1973 and 1975, then was forced to change his identity in order to escape ETA's death warrant on him.

Executive producer Melchor Miralles of Mundo Ficcion discovered Lobo's real identity in the 1980's and convinced him to tell his story. The film was presented in San Sebastian on Tuesday.

Noriega (Open Your Eyes) stars as Lobo ("Wolf") alongside a supporting cast headed by Jose Coronado (Box 507) as a secret service inspector, Jorge Sanz (Belle Epoque) as a member of ETA and Silvia Abascal (My Mother Likes Women) as Lobo's wife.

Antonio Onetti wrote the script and veteran TV director Miguel Courtois will direct the estimated Euros 5m film, shooting for 9 weeks starting next month between Madrid, Barcelona and the French Basque Country.

Julio Fernandez will co-executive produce through his label Castelao though it is not yet confirmed that his Filmax will handle international sales. Broadcaster Telecinco's Estudios Picasso co-produces.

Santiago Ramos (Danube Hotel), Aitor Mazo (My Mother Likes Women) and France's Patrick Bruel (Sabrina) and Melanie Doutey (La Fleur Du Mal) co-star.