Maldives' four opposition leaders have asked the country's Supreme Court to allow them to intervene in the legal challenge filed by outgoing Maldives president Abdulla Yameen Abdul Gayoom seeking to annul last month's presidential election which he lost to the opposition alliance.
President Yameen had filed a legal challenge on Wednesday citing rigging and electoral fraud.
According to opposition sources, the four leaders - former presidents Maumoon Abdul Gayoom and Mohamed Nasheed along with Jumhoory Party (JP) leader Gasim Ibrahim and religiously conservative Adhaalath Party (AP) leader Sheikh Imran Abdulla had sought intervention on Thursday.
It remains unclear whether the Supreme Court had allowed the intervention request.
Maldives' apex court meanwhile is set to hear the legal challenge at 1pm on Sunday.
Yameen lost the September 23 election by a margin of 16 percent to opposition alliance candidate, Ibrahim Mohamed Solih, in an outcome hailed as a win for democracy in the crisis-hit archipelago.
The result was widely accepted, including by the United States, China, India, and the European Union.
Yameen conceded defeat a day after the election but has since alleged widespread irregularities in the vote.
The president, who says he will stay on in office until the end of his term on November 17, has offered little evidence to back his claim.
Solih had been backed by incumbent president Abdulla Yameen Abdul Gayoom's main political rivals including the now jailed former presidents Maumoon Abdul Gayoom, Mohamed Nasheed along with Jumhoory Party leader and business tycoon Gasim Ibrahim.
However, the ruling party has now claimed that the elections commission had rigged the elections and has been carrying out nightly protests demanding the commission to answer recent allegations.