Israel's prime minister is demanding that the deal between Iran and world powers — which is expected to be announced imminently — 'significantly' curb Iran's nuclear program.

Benjamin Netanyahu put out a statement on his Twitter feed, moments before Iran and international negotiators in Switzerland were expected to make a statement on Thursday.

He says: "Any deal must significantly roll back Iran's nuclear capabilities and stop its terrorism and aggression."

Netanyahu has been a vocal critic of the talks, saying the expected deal would leave Iran's suspect nuclear infrastructure intact.