(NEWSER) – What started as a peaceful protest yesterday in Albuquerque ended up with at least six protesters arrested, one officer injured, and more than two dozen canisters of tear gas thrown into the hundreds-strong crowd. Demonstrators started rallying downtown at noon, protesting against officer-involved shootings in the city, particularly the March 16 fatal shooting of homeless man James M. Boyd. The tear gas was used after 9pm, when protesters ignored commands to disperse, theAlbuquerque Journal reports. Demonstrators also blocked traffic and caused "mayhem," the mayor said, as they tried to get onto freeways, the AP reports. Protesters were accused of vandalism, fighting, throwing rocks, and trying to break the windows of a police cruiser with an officer trapped inside. "We respected their rights to protest, obviously," said the mayor, but "they’ve taken it far beyond a normal protest."