A senior US government official said Monday that Iran has met all of its obligations under an interim nuclear agreement with the P5+1 negotiating countries.

A senior US government official said Monday that Iran has met all of its obligations under an interim nuclear agreement with the P5+1 negotiating countries, Xinhua news agency reported on Tuesday.

"Iran has halted process on some aspects of its nuclear program and has rolled it back in a certain way," Deputy Secretary of State Anthony Blinken said at the American Jewish Committee's annual Global Forum.

The US official said recently that the P5+1 countries -- the United States, Britain, France, China, Russia, and Germany -- are making efforts to reach a final deal to curb Tehran's nuclear program by a June 30 deadline.

The deadline was agreed upon by negotiators in November 2014 after their failed attempt to reach a comprehensive nuclear deal due to a huge divide in opinions about how to limit Iran's uranium enrichment capacity and how to lift sanctions.

However, Blinken warned that the deadline could be missed: "The June 30 deadline is fast approaching, and we do not yet have a comprehensive agreement, and there remains a chance that we won't get one," he said.

Blinken said that a comprehensive nuclear agreement represents the best option now and it was a 'fantasy' to believe that intensifying sanctions will prevent Iran from acquiring a nuclear weapon.

There is simply no better option for preventing Iran from obtaining that material for a nuclear bomb" than the current negotiation mechanism adopted by the P5+1 countries, Blinken said.