Iran and the world powers are closer than ever before to signing a historic nuclear deal that would put an end to more than a decade of negotiations. A Western diplomat familiar with the talks told Haaretz that he was optimistic about the possibility of reaching a nuclear agreement and announcing it on Monday.

Iran's President Hassan Rohani hinted Sunday evening at an imminent agreement, and said that he has kept his election promise to resolve the nuclear issue.

U.S. Secretary of State John Kerry and Iranian Foreign Minister Mohammad Javad Zarif, who have been in Vienna for the past 16 days, held another meeting on Sunday to resolve the final open questions in the agreement.

After the meeting, Zarif told reporters that there is still work to be done, but added that there would be no extension of the negotiations beyond the deadline of Monday at midnight. A senior member of the American negotiating team also said that "major issues remain to be resolve."

The final issues to be resolved will be discussed on Monday in meetings attended by the foreign ministers of Iran and the world powers. Russian Foreign Minister Sergey Lavrov and Chinese Foreign Minister Wang Yi joined the talks in Vienna on Sunday, and British Foreign Secretary Philip Hammond will arrive on Monday.

France's Foreign Minister Laurent Fabius, who is already in Vienna, told reporters that he hopes "that we are finally entering the final phase of this marathon negotiation."

Preparations for a final deal are also taking place in Iran. Tehran police spokesman said on Sunday that authorities have completed arrangements for the celebrations expected across the capital immediately after an agreement with the world powers is announced.

President Rohani's statements on Sunday left almost no room for doubt that a nuclear agreement is a matter of hours. "Thank God, I have fulfilled my election promise to try and solve the nuclear crisis," Rohani said at a Ramadan fast-breaking dinner with a group of Iranian women. "We are a few steps away from the peak even if the process stops now, we have performed our duty."

A hefty document

The nuclear agreement taking shape is a hefty document. The main chapter consists of 20 pages, but includes addendums of some 80 pages. Iran's Fars news agency, which has close ties to the Revolutionary Guard, quoted a source at the Iranian delegation on Sunday afternoon as saying that according to the draft deal, "all sanctions will be lifted from Iran, but temporary restrictions will remain in place for a period of time."

According to the official, all of the economic sanction and bank-related sanction will be lifted immediately after the agreement is adopted. The source said that even the embargo imposed by the UN Security Council since 2006 will be lifted, and temporary restrictions on arms trading with Iran would be placed on Iran for a period of time. According to the source, none of the clauses in the agreement deviate from the red lines presented by Iranian Supreme leader Ali Khamanei.

Netanyahu slams 'murderous aggression'

In Jerusalem, Prime Minister Benjamin Netanyahu slammed the world powers over the imminent nuclear deal. "Iranian leader [Ali] Khamenei has said that the U.S. should be fought even if an agreement is reached, Rohani is heading a hate march in which U.S. and Israeli flags are being burned and calls for death to America and Israel are being made, and at the same time, concessions are being offered to Iran," Netanyahu said at start of the weekly cabinet meeting.

The prime minister added that the deal currently in the works paves a path for Iran to create multiple nuclear bombs and endangers the world at large.

"Iran is not hiding its intentions to continue with its murderous aggression against those who are now negotiating with it," Netanyahu said. "Maybe the powers are willing to give in to a reality underwritten by Iran, which includes unending calls for the destruction of Israel. But we will not accept that."

During the cabinet meeting, Netanyahu said the upcoming deal reminded him of the agreement signed between the U.S. and North Korea – adding that the world knew how that turned out. Netanyahu showed the minister a video of former U.S. President Bill Clinton making a speech on October 21, 1994, the day the U.S. and North Korea signed the deal meant to put an end to the communist state's nuclear program.

In the video, Clinton says the agreement will bring North Korea to dismantle its nuclear program, making the world a safer place as nuclear proliferation grinds down. North Korea disavowed the deal in 2003 and resumed its military nuclear program. Several years later it tested a nuclear weapon, and according to some estimates it possesses several nuclear bombs.