U.S. Secretary of State John Kerry on Monday told a press conference here that any deal that would possibly agree with Iran will make Israel safer than it is today.

"Israel's security is absolutely at the forefront of all our minds, but rightly so is the security of all the other countries in the region, so is our security in the United States." Kerry said.

Kerry also warned Israel against revealing details at Isreali Prime Minister's upcoming speech to U.S. Congress of an Iran nuclear deal that world powers are in the process of negotiating.

"We are concerned by reports that suggest selected details of the ongoing negotiations will be discussed publicly in the coming days," Kerry said. "I want to say clearly, doing so would make it more difficult to reach the goal that Israel and others say they share in order to get a good deal."

Israeli official have said that they knew about the emerging nuke agreement and that Isreali Prime Minister Benjamin Netanyahu would elaborate in his congressional address.

Immediately after the press conference, Kerry headed to the nearby Montreux, Switzerland, where the new round of Iran nuclear talks will start Monday evening between Kerry and his Iranian counterpart, Mohammad Javad Zarif.

The talks will be continued on Wednesday by senior diplomats from Iran and the P5+1 group, namely the U.S., Britain, France, Russia, China and Germany.

Last week, a senior U.S. official said the Iran nuclear talks have "made substantial progress," but "did not expect an agreement to be reached next week."