Updated at 2:25 p.m. Tuesday with police chief's statement.

The Dallas police chief is questioning whether pepper balls should have been used to control the crowd at Monday night's protest against police brutality.

"I am concerned to learn of reports that one of our officers deployed potentially several pepper balls during a demonstration last night," Chief U. Renee Hall said in a written statement Tuesday. "They are only to be utilized if instructed to do so by the on scene commander or if there is an immediate threat to the public.

Here's raw video of a Dallas police officer firing a Pepperball Gun to keep protesters from marching down Cadiz St. The protesters are marching for Botham Jean who was shot and killed by a Dallas officer last week. pic.twitter.com/eeMbnqRizZ — Tommy Noel (@TommyNoel) September 11, 2018

Hall said she ordered a full review and plans to meet with protest leaders to "address their concerns."

Pepper balls are a nonlethal projectile police use to disperse crowds. They typically contain the chemical found in pepper spray that irritates the eyes and nose.

Protesters shouting for justice in English and Spanish gathered Monday at Dallas police headquarters to speak out against the recent shootings of two minority men.

Community activists organized the rally to protest Officer Amber Guyger's killing of 26-year-old Botham Jean on Thursday night.

Jean's death has garnered national attention, but some protesters also came to denounce the fatal shooting of 38-year-old Jorge Olguin. He was killed Sept. 1 by a security guard after an argument broke out at a family party in Red Bird.

"We demand to know the name of the security officer who killed Jorge," activist Ruben Salinas said.

The groups had begun their protests separately, but activist Dominique Alexander urged the crowd of about 150 to unite.

"One thing we are not going to do is let these cameras see us divided," Alexander said. He asked for everyone to hold each other.

Several dozen protesters blocked traffic as they marched in the streets to the Dallas Police Association office about half a mile from police headquarters in the Cedars. Officers, some on horseback, followed.

At one point a police officer fired pepper balls to help control the crowd.

The rally ended back at the headquarters as leaders asked people to return for another protest Wednesday.

Activist Diane Ragsdale and former councilwoman says “race matters.” She said she believes officer Amber Guyger killed Botham Jean because he was a black man. pic.twitter.com/qK8viPBceF — Cassandra Jaramillo (@cassandrajar) September 11, 2018

The demonstration came a day after Guyger was charged with manslaughter in Jean's death Thursday night at the South Side Flats apartments on South Lamar Street.

Guyger said she mistook Jean's apartment for her own, which was one floor below. When she saw a silhouette in the dark she thought she was being burglarized and fired, striking Jean in the chest, according to an arrest warrant affidavit.

Breaking News editor Matt Peterson contributed to this report.