VIENNA (REUTERS) - A draft nuclear deal between Iran and six major powers calls for UN inspectors to have access to all suspect Iranian sites, including military, based on consultations between the powers and Teheran, a diplomatic source said on Tuesday.

The source also said that if the deal is agreed, a UN Security Council resolution on it would ideally be adopted this month and the steps to be taken by both sides - including Iranian limitations on its nuclear programme and relief from sanctions on Iran - implemented in the first half of 2016.

The information from the source was preliminary and subject to change as it was based on a draft of the nuclear deal that was not the final version and that could be amended before final approval by Iran and the six powers.

Diplomats close to the talks say that they are hoping to approve a final version of the draft document as early as Tuesday.

Negotiations were continuing in the early hours of Tuesday to reach an agreement, the diplomats said.