Egypt's interim president Adli Mansour is to offer roles for Muslim Brotherhood leaders in his transitional cabinet, in an attempt to reduce political tensions after the recent bloodshed.

Ministerial positions will be offered to both the Freedom and Justice Party, the political wing of the Brotherhood, as well as the Islamist Nour Party.

"There is no objection at all to including members of those two parties in the government," a presidential spokesperson said, according to the state-run media.

However Mansour's gesture has failed to appease the party led by Mohamed Morsi, who was ousted as president on 3 July.

A decree issued by Mansour, laying out a timetable for fresh elections and facilitating amendments to the constitution, has been repudiated by the Brotherhood - a stance echoed by the National Salvation Front, which claims it was not consulted over the constitutional declaration.

Following this rejection, Mansour is likely to renew his attempts to iron out the differences among the political parties.

The interim leader has announced a reconciliation initiative entitled One Nation, which will be unveiled in the coming days in an effort to bring all the political parties together.

"The presidency invites everyone to participate in an overarching initiative whereby a humanitarian basis for coexistence shall be set," said his office.

The statement added that the interim leader will hold talks with leaders from across the political spectrum to "avoid bloodshed".

The Egyptian army, which ousted Morsi, has insisted that the transition period will be difficult for the country and urged all political parties to participate. The military also warned against using violent methods against the administration.

In a relief to the interim government, wealthy Gulf Arab states have come forward to provide $8bn in financial aid to keep the Egyptian economy alive.