FACTBOX - Who will not invest in Iran

(Reuters) - Total's CEO Christophe de Margerie reaffirmed in interview with L'Express weekly magazine that Iran remains a priority country for investments but the firm will not invest there now.

Political tensions around Iran have forced some companies to curtail or slim down their investment in the country.

Here are some details:

TOTAL:

-- Earlier this month de Margerie said that French energy group Total would not invest in Iran because the political risk is too high.

-- Total has a memorandum of understanding with state-owned National Iranian Oil Company to develop Phase 11 of the South Pars field. The firm previously said it had a long-term interest in the project but saw short-term difficulties reaching a deal.

-- Iran had said it wanted Total to commit to the deal by mid-year but the French government, concerned about Iran's nuclear programme, had urged Total not to invest.

ROYAL DUTCH SHELL:

-- Last May, Royal Dutch Shell pulled out of Phase 13 of the giant South Pars gas field project, after coming under pressure not to participate from U.S. lawmakers who were concerned about Iran's nuclear programme.