The Joe Biden administration prioritizes alliances with NATO, South Korea and others as a "profound source of strength" for the United States, State Department spokesperson Ned Price said Thursday.

The remarks came as Washington is trying to quell doubts about the US,' security commitments to its allies after the pullout of its troops from Afghanistan has led critics and even some allies, like Britain, to question the credibility of the US-led alliances.

"It is safe to say that this administration has prioritized our system of alliances and partnerships in profound ways, and we've done that because we recognize them as a profound source of strength," Price said in a press briefing on Thursday (US time).

Price reiterated that the troop withdrawal decision was made "in close coordination" with NATO allies.

He said the US policy focus on the Indo-Pacific region demonstrates its commitment to alliances, adding that South Korea and Japan were the first countries visited by US Secretary of State Antony Blinken after they took office early this year.

He also reaffirmed that the denuclearization of the Korean Peninsula is an issue that directly relates to the security interests of the US and its Asian allies.

"Our focus will continue to be on the denuclearization of the Korean Peninsula -- the denuclearization which will work to advance our national security interests but also the interests of Japan and the Republic of Korea," he said, referring to South Korea by its official name.

Earlier in the day, Biden told ABC News that the allies, like South Korea and Taiwan, are fundamentally different from the situation in Afghanistan, stressing that the US has kept "sacred commitment" that it would respond if anyone were to take action against its allies.

Biden has defended the withdrawal from Kabul and chided the Afghan military for its unwillingness to fight and Afghan leaders for disunity, while stressing the US goal had been preventing terrorism rather than "nation building." (Yonhap)