By Tony Czuczka

Bloomberg, 11 May 2012 – Iran is pursuing work on a nuclear warhead, Die Welt said, citing a report by the People’s Mujahadeen and a member of the opposition group.

Scientists are carrying out research in a five-floor building in Tehran’s Pars neighborhood and conducting testing at Iran’s Parchin site, the group said in a report it says is based on information obtained from people within the Iranian government and military, the Berlin-based newspaper said today.