The deal being hammered out between world powers and Iran on its nuclear programme would "pave the way" to a nuclear-armed Tehran, Israeli Prime Minister Benjamin Netanyahu said Tuesday.

"The greatest threat to our security and our future was and remains Iran's attempt to be armed with nuclear weapons," he said in a speech to parliament.

"The agreement being formulated in Lausanne paves the way to that goal," Netanyahu said, referring to talks between Iran and world powers in the Swiss city on a framework deal which he opposes.

"We will do everything to protect our security and our future," Netanyahu said.

Netanyahu's remarks, made at the swearing-in ceremony of the Israeli parliament, came hours before the deadline for a framework agreement aimed at preventing Iran from acquiring nuclear weapons, in exchange for easing crippling sanctions.

According to Netanyahu, the emerging agreement will "most likely leave Iran with underground facilities, the nuclear reactor in Arak, advanced centrifuges -- all those things that were just a few months ago rightly presented to us as not essential to a peaceful nuclear programme."

Netanyahu said the "breakout time" for Iran to obtain fissile material for a bomb would not be "years" but rather "a year, possibly even much less than that," under the framework agreement.

According to Netanyahu, "most" Arab states shared Israel's concerns regarding a nuclear-armed Iran.

"They understand the Iranian threat, the share our perspective on other threats from extremist Islamist elements," he said.

"This also creates opportunities," said the Israeli premier.

"I hope this cooperation between Arab states and us will help us advance peace with our Palestinian neighbours."