Reporter Michelle Fields resigned Sunday night from the conservative news site Breitbart over its response to her alleged assault by Donald Trump’s campaign manager, reported NBC News. 

Fields colleague Ben Shapiro also resigned from Breitbart, saying that the site should be “ashamed” of “their treatment” of FIelds.

"I do not believe Breitbart News has adequately stood by me during the events of the past week and because of that I believe it is now best for us to part ways," Fields said in a statement issued to Buzzfeed.

Fields accused Trump campaign manager Corey Lewandowski of grabbing her arm so hard that she bruised as she attempted to question the candidate at an event last week. Fields wrote an account of the incident and Politico published an audio transcript that captured the interaction. 

A Washington Post reporter also witnessed the transaction between Fields and Lewandowski and wrote an account of what had taken place. 

Lewandowski called Fields "delusional" and an "attention seeker," while Trump accused the reporter of having "made up" the incident, reported NBC News. 

Another Breitbart reporter questioned Fields' allegations on Twitter. That reporter was suspended and the news site's chief executive issued a statement backing Fields and calling on Lewandowski to apologize.

Breitbart published images soon after that questioned whether the Washington Post's Ben Terris misidentified Lewandowski as the person who may have physically assaulted Fields. Breitbart later published a piece showing text messages from Lewandowski which it said "prove" he didn't assault Fields.

The Fields incident came a week after a Time magazine photographer was thrown to the floor by a Secret Service agent at another Trump rally and amid escalating concerns over the rhetoric used by the Republican front-runner.