Washington (CNN) A federal judge on Monday ordered former national security adviser Michael Flynn to appear at a hearing next week to discuss plans for his eventual sentencing in the Russia investigation.

Flynn's legal team and prosecutors working for special counsel Robert Mueller recently asked to delay Flynn's sentencing for an additional two months. Flynn pleaded guilty in December to lying to investigators and has been cooperating with the Mueller investigation. While he has been assisting the investigation, prosecutors have sought to delay his sentencing.

But the judge overseeing the case is showing impatience. Judge Emmett Sullivan ordered everyone back for a hearing next week, which would be Flynn's first court appearance in seven months. Mueller's team could also have a chance to drop some hints on how Flynn is helping their investigation, which is increasingly the target of attacks from President Donald Trump and his Republican allies.

In their request for a delay , prosecutors also asked for a probation officer to prepare a report on Flynn's background and how it fits with sentencing guidelines. This was a departure from standard procedure, because that step usually occurs in the wind-up to sentencing.

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