"I will never treat anyone this way again," one boy tells the taunting victim

At least three of the students who were seen taunting school bus monitor Karen Klein on a viral video have issued statements of apology to the 68-year-old grandmother.

“I am so sorry for the way I treated you,” one of the students, identified only as “Josh,” said in a statement issued by police Thursday to Anderson Cooper 360. “When I saw the video I was disgusted and could not believe I did that. I am sorry for being so mean and I will never treat anyone this way again.”

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Another student, identified as “Wesley,” also issued an apology, writing: “I feel really bad about what I did. I wish I had never done those things. If that had happened to someone in my family, like my mother or grandmother, I would be really mad at the people who did that to them.”

According to CBS News, the boys in the video, and their families, have received death threats.

The mother of “Wesley” also issued a statement to Anderson Cooper 360, which reads in part: “I cannot even tell you how badly I feel. I am deeply sorry for what my son did. I am embarrassed, angry and sad about the awful way he treated you.”

As part of the outpouring of support for Klein, a fundraiser was started with the goal of collecting $5,000, to give her a “dream vacation.” As of Thursday evening, donations had surpassed $440,000. (And her video has been seen by 3.7 million people, as of Friday morning).