Blinken’s travel was delayed over “uncertainty about the situation,” Axios said, citing two unnamed sources.

Blinken was planned to stop in Qatar, Egypt, Israel and possibly Iran.

"Trip (to Iran) isn't final because like everyone else Blinken is waiting to see if Iran attacks or not," Axios reporter Barak Ravid wrote on X on Monday, citing a source.

White House national security spokesperson John Kirby said on Monday that the US has prepared for what could be significant attacks by Iran or its proxies in the Middle East as soon as this week and the US had increased its regional force posture.

On Tuesday, Hamas fired two rockets aimed at Tel Aviv for the first time in months while Israel launched separate deadly airstrikes in Gaza.

On Monday, US officials had said they expected Thursday's talks to continue as planned.

Leaders of Egypt, the US, and Qatar called on Friday the Israeli government and Hamas to resume the ceasefire talks by Thursday.

Since 7 October, Israel has killed nearly 40,000 people in Gaza, mostly children and women, injured over 91,000, caused extensive damage to Gaza's infrastructure, and displaced most of the strip’s residents.