The International Atomic Energy Agency has suggested Kim Jong Un is not moving toward denuclearization.
The IAEA stated that its observers had access "to all the sites and locations in Iran which it needed to visit" under the agreement's framework.
The International Atomic Energy Agency called the "further development" of Pyongyang's nuclear program a "cause for grave concern" in a report.
The International Atomic Energy Agency said Iran was in compliance with the 2015 nuclear deal.
The confidential report by the International Atomic Energy Agency (IAEA) did not point to any violations in Tehran's observance of the deal.
Iran must now demonstrate that it has restricted its nuclear program as promised.
Opponents of the Iran nuclear deal have pointed to the report as another reason to block the agreement.
Part of the ongoing nuclear negotiations involve lifting the sanctions currently imposed on Iran.
Iran has already destroyed its weapons-grade uranium and halted the Arak nuclear plant.
Six countries in negotiations with Iran as U.N. nuclear watchdog says Tehran must address questions over explosives testing.
Iran's foreign minister on Thursday suggested that a 10-year freeze on some aspects of the country's nuclear program might be acceptable.
The accusation intensified tensions before Israeli Prime Minister Benjamin Netanyahu's contentious March visit to Washington.
Energy minister says the problem should be resolved by Friday.
Secretary of State John Kerry will meet Iran's foreign minister and the European Union foreign policy chief in Oman on Nov. 9-10 to discuss the Iranian nuclear issue ahead of a looming deadline for a final agreement, the U.S. State Department said on Friday.
A high-level U.N. nuclear watchdog team will visit Tehran for talks in coming days, Iran said on Friday, more than a month after it missed a deadline for addressing questions about its suspected atomic bomb research.