The New York City Police Department and the Civilian Complaint Review Board are investigating the pepper spraying of demonstrators involved in the "Occupy Wall Street" protests over the weekend, as a second video of the alleged spraying emerged.
The video, posted on YouTube on Wednesday, shows an officer waving a canister he appears to spray into the crowd.
The NYPD's Internal Affairs Bureau was already looking into whether a deputy inspector acted excessively during Saturday's protest.
The first video, which appeared on Saturday, showed some people screaming after being sprayed.
At least 80 people have been arrested in connection with the protests, which began on September 17.
Police Commissioner Ray Kelly said Wednesday that the video only shows one side of the story.
"Proponents of a certain position will show you just what they want to show you," said Kelly. "As I said, the crowd, the group left the park on 14th Street. They were blocking traffic on University Place. We don't see any of that."
"Today we had a march and police deliberately blocked the parade. And we had to stop and there was a brief tense moment where the police seemed like they wanted to react but due to the circumstances and all of the cameras and lawyers they were unable to do so," said one protestor.
Some of the same groups from the Wall Street protests are planning to hold a march near NYPD headquarters on Friday.
Kelly said the department plans to make sure it goes off without incident, even though the marchers do not have a permit.