Nasa flag bearer Raila Odinga at NASA offices in Westlands, Nairobi on Wednesday when he made the 'big announcement'. [Photo: Citizen Digital]

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Following NASA's 'big announcement' on Wednesday, all indications were that they were ready to move to the Supreme Court on Thursday to file its petition.

However, by Thursday evening, none of the opposition coalition’s lawyers had appeared at the court registry.

But one of the lawyers representing the Nasa and politicians allied to it told the Nation on Thursday that the coalition was not leaving anything to chance.

He said Nasa was buying time to put together a water-tight case and would file the petition challenging President Uhuru Kenyatta’s re-election on Friday (today).

On Wednesday, Nasa leaders announced their intention to challenge in court the outcome of the presidential election held last Tuesday despite having initially said they would not.

The petition must be filed within seven days after the declaration of the presidential election results, meaning Nasa has to do so by Friday midnight

Independent Electoral and Boundaries Commission (IEBC) chairman Wafula Chebukati declared President Kenyatta the winner of the 2017 General Election on Friday, August 11.

Although judges are on recess and court registries close at noon, Supreme Court Registrar Esther Nyaiyaki put out a public notice on August 14 stating that the registry will be open on Friday from 7am to midnight.

"In order to adhere to the statutory deadlines governing the hearing and determination of the presidential election petition, the Supreme Court Registry will be open upto midnight," said Nyaiyaki in the notice.