Calls between both President Obama and Secretary of State John Kerry John Forbes KerryThe Memo: Warning signs flash for Trump on debates Divided country, divided church TV ads favored Biden 2-1 in past month MORE with Israeli Prime Minister Benjamin Netanyahu were interrupted when rocket sirens went off in Tel Aviv forcing Netanyahu to go into a bunker.

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"Literally in the middle of a conversation both with the president and with me – while we were talking with the prime minister sirens went off," Kerry said on CNN's "State of the Union."

"The prime minister of Israel had to interrupt the conversation with the president of the United States to go to a shelter," he added. "People can't live that way."

Obama and Kerry talked with the Israeli prime minister on Friday and Saturday, respectively, and Obama is expected to talk with Netanyahu again Sunday, the secretary of state said.

Both Obama and Netanyahu briefly mentioned the sirens after their call Friday, but the siren in Kerry's call with the prime minister wasn't previously mentioned.

Kerry said the U.S. is supporting the Egyptian initiative for a cease-fire in Gaza and the secretary of state is expected to visit the area to help broker a deal.

Netanyahu wouldn't say on CNN if it was too late for Hamas to accept the Egyptian deal.