A federal agency is apologizing to a Native American woman for its “mistake” when an agent grabbed the woman’s braids and yelled “Giddyup” while she was passing through a checkpoint.

The incident happened Jan. 13, according to Tara Houska, an attorney and indigenous rights activist. On social media, Houska said the offensive act happened at Minneapolis-St. Paul International Airport.

Houska was traveling back to Bemidji, Minnesota, after attending a climate change rally in Washington.

The TSA also confirmed the incident.

A Minnesota TSA manager is apologizing for what it calls a "mistake" and said the agency must learn from the incident, according to KARE.

The TSA has launched an investigation into the incident and told Fox News the agency "holds its employees to the highest standards of professional conduct and any type of improper behavior is taken seriously."