A police officer in Tucson, Arizona, shoved an 86-year-old woman onto the pavement during a tense confrontation with demonstrators opposed to President Donald Trump’s immigration policies, video footage shows.

The Tucson Police Department said that it is investigating the incident from earlier this month that also left a retired school teacher with a face full of pepper spray as she tried to help the elderly woman, who is reportedly 4-foot-5 and weighs less than 100 pounds, up off the ground. “I saw the police being way more aggressive than I’ve ever seen them be,” Rolande Baker, the 65-year-old former educator told the Washington Post, adding that the pepper spray attack had left her temporarily blind.

Authorities released body cam footage of the protest on Friday following a Freedom of Information Act request by Tucson News Now, a local television station, and amid mounting accusations among local immigration advocates that police had used excessive force against protesters. Tucson police chief Chris Magnus has said that officers handled the crowd appropriately. You can watch the entire body cam footage here.

Organizers estimated that more than 100 people had taken part in the event outside of Tucson’s downtown Federal Building as part of the nationwide Day Without Immigrants protests during the early evening of February 16. The peaceful demonstration turned chaotic after the crowd spilled out onto the street and some of the protesters allegedly refused to return to the sidewalks.

Three officers sustained minor injuries and four protesters were arrested, police said.

According to Baker, the 86-year-old woman had locked arms with three other women in front of a police van to block it from leaving the area. Officers managed to eventually unlink the women’s arms. Body camera footage shows that the elderly woman, who has not been identified by authorities, approached several officers and she pointed her finger at them and shouted.

That’s when one of the police officers appears to shove the 86-year-old woman’s arm, who falls backward and strikes her head on the pavement, video shows. Soon after, officers blast Baker in the face with pepper spray. The elderly woman was reportedly uninjured and neither she nor Baker were arrested.

“It’s just terrible,” Baker told the Post. “Would you do that to your mother? Would you do that to your grandmother? Because I’m about the age of your grandmother.”

The video footage of the clash comes as Republican lawmakers in Arizona push a bill to crack down on organized demonstrations. The state’s GOP-controlled Senate on Wednesday approved legislation that would allow the government to seize the assets of protesters and prosecute them under a racketeering law designed to target organized crime.