A black family in Maryland was outraged earlier this week when they discovered classmates on their daughter’s school bus chanted a song the featured a racial slur.

Rockville, Maryland resident B. Jamar Long posted a video on Facebook this week showing students singing a derogatory song about “n*ggers” on their way to school as his daughter sat by.

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“Our daughter had to experience racism today on her school bus from Robert Frost Middle School in Montgomery County MD,” Long wrote. “They are singing ‘1,2,3,4 how many n*ggers are in my store.’ I am outraged and I refuse to let this slide. Please help me make this viral.”

As of this writing, the video has been viewed more than 300,000 times and has been shared nearly 19,000 times, so it seems that Long has succeeded in drawing attention to it. Local news station Fox 5 DC reports that Montgomery County Public Schools says it is investigating the video.

Watch the video for yourself below.