School authorities in Hazleton, Pennsylvania, are facing criticism after a video was posted online showing a white school police officer attacking an African-American teenage girl. The video shows four school officials surrounding the girl as one officer punches her in the leg, then grabs her hair and violently pushes her head onto a cafeteria table. In the video, dozens of nearby students can be seen screaming at the officers to stop. Hazleton school officials said the officers were de-escalating a student brawl, which resulted in the suspension of four students. The video was posted online on Monday as schools across the country began to mark Black Lives Matter at School Week.