US Secretary of State John Kerry talks with Iranian Foreign Minister Javad Zarif after the International Atomic Energy Agency (IAEA) verified that Iran has met all conditions under the nuclear deal, in Vienna, Jan 16, 2016. [Photo/Agencies]

On Saturday, US House Speaker Paul Ryan vigorously denounced the nuclear deal, vowing that lawmakers would "do everything possible" to prevent Tehran from getting the atomic bomb.

The Republican leader warned in a statement that "Iran is likely to use this cash infusion - more than 100 billion US dollars in total - to finance terrorists."

"This comes just weeks after Tehran's most recent illegal ballistic missile test, and just days after the IRGC detained 10 American sailors," he said, referring to the Islamic Revolutionary Guard Corps.

"A bipartisan majority in the House voted to reject this deal in the first place, and we will continue to do everything possible to prevent a nuclear Iran," he said.