US Secretary of State Antony Blinken has reaffirmed the Joe Biden administration's plans to push ahead with nuclear talks with Iran, despite Republican calls to abandon talks over Tehran's alleged support for Gaza-based Hamas.

Earlier, a group of 43 Republican senators sent a letter to Blinken asking him to cancel the multilateral nuclear talks in Vienna.

Blinken said he could not confirm that Iran was in any way involved in the latest Hamas actions. He noted that if Tehran had a hand in supporting the movement, this would only further emphasize the importance of the negotiations.

When it comes to any malicious activity by Iran, it only underlines the importance of doing everything possible to ensure that Iran never gets nuclear weapons, Blinken said.