FREMONT COUNTY, Colo. (WJW) – A Colorado school bus driver was fired after allegedly hitting a child who questioned the requirement to wear a mask.

According to KXRM, the Fremont County bus driver was charged with child abuse causing injury, third-degree assault, and harassment.

Surveillance footage of the incident, which happened last month and was shared on Twitter, shows a man asking the child to wear a mask. The student responds “why?” and more crosstalk is heard.

The video then shows the man striking the child across her face.

In a statement to the school district, the driver wrote “out of reaction, I slapped her once,” according to KKTV.

The district told FOX News they are currently investigating the situation and looking to find strategies to “support a safe ride to and from school.”