The MACC has secured an additional two days to remand an ex-aide to former prime minister's wife Rosmah Mansor.

This is to facilitate a probe into the company that was awarded the solar hybrid project for rural schools in Sarawak.

The aide's lawyer Ridha Abdah Subri, said the MACC had originally applied for a seven-day extension but was only granted two days by the Putrajaya magistrate's court.

"So by Sunday, he must be released," Ridha told reporters after the remand hearing today.

The 44-year-old, who was previously attached to the prime minister’s office, had been detained on Monday.

Malaysiakini revealed in June that the Education Ministry under the previous administration had awarded the solar hybrid project for 369 rural schools in Sarawak to a Bintulu-based company under "direct orders" from Najib.

Documents sighted also showed that the contract tender bypassed the Education Ministry's standard operating procedures and procurement processes.

Aside from the former aide, three other individuals have also been detained by the MACC to facilitate investigations into the case.

However, the Bintulu-based company awarded the project has denied any wrongdoing.