US Secretary of State Antony Blinken has postponed his trip to the Middle East, delaying his planned Tuesday departure, Axios reported ahead of planned Gaza ceasefire talks this week.

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

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.

Also on Tuesday, Blinken approved the possible sale to Israel of fighter jets and other military equipment worth over $20 billion, the Pentagon said.

In a statement, the Pentagon said Blinken approved the possible sale of F-15 jets and equipment worth nearly $19 billion. He also approved the possible sale of tank cartridges worth around $774 million and army vehicles worth $583 million, the Pentagon said.

The tank rounds would be almost immediately available for delivery. The Boeing Co. F-15 fighter jets would take years to produce and deliver.

The US has staunchly supported Israel as its top Middle East ally prosecutes a war in the Gaza Strip that has devastated the Palestinian enclave. The war was set off by the militant group Hamas’ Oct. 7 attack in southern Israel.

While approving weapons to Israel, Washington has also tried to arrange a ceasefire deal in Gaza that would potentially stave off a wider Middle East war.

Fears of a broader war have increased since the recent killings of Hamas leader Ismail Haniyeh in Iran and Hezbollah military commander Fuad Shukr in Beirut. Both drew threats of retaliation against Israel.