Police have reportedly completed their review of problematic evidence in a corruption probe against Prime Minister Benjamin Netanyahu and sent it back to Attorney General Avichai Mandelblit ahead of the expected indictment of the premier next week.

The Walla news site quoted a source involved in the issue, who said police had not carried out new investigations, but rather had re-processed existing material gathered during the investigation.

The case files were reopened due to claims by Netanyahu’s lawyers during the pre-indictment hearings last month relating to Case 4000.

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The source told Walla that the review was complete and the files had now been sent back to Mandelblit.

In Case 4000, Netanyahu is suspected of pushing regulatory decisions financially benefiting the controlling shareholder of the Bezeq telecommunications group, Shaul Elovitch, in return for ongoing positive coverage from Bezeq’s Walla news site. It is the most serious of the three cases against the prime minister, carrying possible charges of bribery, fraud, and breach of trust.

According to a report by the Kan broadcaster earlier Sunday, Mandelblit studied correspondence between associates of the prime minister and the owner and the CEO of the Walla news site. He also looked at past headlines featured on the site.

Netanyahu’s lawyers had argued there was no connection between the correspondence and the headlines.

The reexamination of the materials was described by the Kan public broadcaster and Channel 12 as highly rare at this late stage of the investigation.

The indictments against Netanyahu are expected to be announced next Sunday or Monday.

Mandelblit served as cabinet secretary under Netanyahu and was appointed by him to the attorney general post in 2016.

In a draft charge sheet issued in February, Mandelblit outlined an indictment for bribery, fraud and breach of trust against the premier in Case 4000, and fraud and breach of trust in two other cases, dubbed by police, Case 1000 and Case 2000.

In Case 1000, Netanyahu is suspected of illicitly receiving gifts such as champagne, cigars and jewelry valued at some NIS 700,000 ($201,000) from billionaire benefactors Arnon Milchan and James Packer, and allegedly reciprocating in Milchan’s case with various forms of assistance.

In Case 2000, Netanyahu is accused of agreeing with Yedioth Ahronoth newspaper publisher Arnon Mozes to weaken a rival daily in return for more favorable coverage from Yedioth. The agreement was never implemented.

In October, prosecutors and the prime minister’s legal team held several days of hearings in which Netanyahu’s attorneys sought to refute the allegations against him.

Netanyahu denies all wrongdoing and has frequently claimed that the investigations against him are a witch hunt and a conspiracy orchestrated by the media, the left, police and the state prosecution.

The legal woes come as Netanyahu is fighting for his political survival, with the country’s unprecedented second election of the year again failing to provide him with a clear victory. In last month’s election, neither Netanyahu nor his chief challenger, Benny Gantz, secured the required parliamentary majority to form a new government. Both men have expressed support for a unity government as a way out of the deadlock, but they remain far apart on who should lead it and what smaller parties would join them. Gantz is attempting to form a coalition; his mandate to do so expires on Wednesday.