President Donald Trump attempted to call former U.S. Attorney Preet Bharara two days before firing him, but Bharara declined to take the call, according to a Sunday Reuters report.

After the president called, the U.S. Attorney for the Southern District of New York contacted the Justice Department to ask permission to speak to Trump, which he was denied, Reuters reported.

Bharara called back the woman trying to facilitate the call between him and Trump and said he would not take the call without the approval of the DOJ.

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The Justice Department oversees federal prosecutors and is currently led by Trump-appointed Attorney General Jeff Sessions Jefferson (Jeff) Beauregard SessionsTrump's policies on refugees are as simple as ABCs Ocasio-Cortez, Velázquez call for convention to decide Puerto Rico status White House officials voted by show of hands on 2018 family separations: report MORE.

Bharara, along with 45 other Obama-appointed federal prosecutors, was asked to resign by the Justice Department on Friday. While that is not unusual, many were surprised to see Bharara’s name on the list, because Trump had previously said he’d keep him on.

Bharara refused to resign and ultimately was fired on Saturday.

I did not resign. Moments ago I was fired. Being the US Attorney in SDNY will forever be the greatest honor of my professional life. — Preet Bharara (@PreetBharara) March 11, 2017

Bharara oversaw the Southern District of New York, where he led investigations and prosecuted multiple notable cases ranging from corruption to terrorism to white-collar crime.

Reuters reports that three watchdog groups asked Bharara to investigate whether the Trump Organization could or may be receiving benefits from foreign governments.

Norm Eisen leads one of the groups, Citizens for Responsibility and Ethics in Washington. Eisen, who formerly served as a White House ethics lawyer, said he found the timing of the firings “odd.”

"You don't decide to keep 46 folks on, then suddenly demand their immediate exit, without some precipitating cause or causes,” Eisen told Reuters.

Sen. Elizabeth Warren Elizabeth WarrenNo new taxes for the ultra rich — fix bad tax policy instead Democrats back away from quick reversal of Trump tax cuts It's time for newspapers to stop endorsing presidential candidates MORE (D-Mass.), in a series of tweets Sunday morning, said that President Trump Donald John TrumpBarr criticizes DOJ in speech declaring all agency power 'is invested in the attorney general' Military leaders asked about using heat ray on protesters outside White House: report Powell warns failure to reach COVID-19 deal could 'scar and damage' economy MORE’s call to Bharara would be “breaching protocol.”

Preet Bharara had authority over Trump Tower. @realDonaldTrump called him directly, breaching protocol. 24 hrs later he was asked to resign. — Elizabeth Warren (@SenWarren) March 12, 2017

The Justice Department did not provide Reuters information about possible contact between Trump and the U.S. Attorney before Bharara was fired. The White House also had no comment for Reuters.