Undated satellite image provided by Space Imaging/Inta SpaceTurk shows once-secret Natanz nuclear complex in Natanz, Iran, about 150 miles south of Tehran

Iran says it may resume some nuclear fuel activities in the coming days, after it failed to reach an agreement with the European Union over its nuclear program.

Tehran's chief nuclear negotiator Hassan Rohani said Saturday it was unlikely the Islamic Republic would resume actual uranium enrichment. But he said some other form of nuclear work could resume next week.

Iran froze all uranium enrichment activities last November as part of an agreement with the European Union's three negotiating countries. British, French and German officials have offered Iran economic incentives in return for giving up uranium enrichment.

The United States accuses Tehran of trying to obtain nuclear weapons. But Iran says its nuclear program is only for generating electricity.