National security adviser Jake SullivanJake SullivanSunday shows preview: CDC school reopening guidance stirs debate; Texas battles winter freeze ErdoÄŸan: Turkey wants to strengthen ties with US after relationship was 'seriously tested' Biden speaks to Netanyahu for first time since taking office MORE on Sunday said the Biden administration has begun discussions with Iran regarding the American hostages the Islamic Republic currently holds.

CBS's "Face the Nation," host Margaret Brennan asked Sullivan if hostage negotiations had begun, noting that at least five American hostages are being held in Iran.

“We intend to very directly communicate with the Iranians about the complete and utter outrage, the humanitarian catastrophe that is the unjust, unlawful detention of American citizens in Iran,” Sullivan said.

“First, Joe BidenJoe BidenClose to 70 dead in states with severe winter weather: report Two more deaths confirmed in Louisiana related to severe winter weather Lawyer who filed suit to reverse 2020 election results referred by judge for discipline MORE is intent, determined to prevent Iran from getting a nuclear weapon.