CNN) -- Protests erupted shortly after a young man killed by a subway police officer was laid to rest in Oakland on Wednesday night, according to local media and iReporters. Oscar Grant, 22, was killed January 1 in a shooting at a subway station in California's Bay Area. The Oakland Police Department made 105 arrests, including a mass arrest of about 80 people at 11 p.m., said Officer Jeff Thomason. The charges include inciting a riot, vandalism, assault on a police officer and unlawful assembly, he said. One officer was injured, but not seriously, Thomason said. Footage from CNN affiliate KTVU-TV showed demonstrators rampaging through the streets of Oakland, California, protesting the death of Oscar Grant, a 22-year-old father who was killed on New Year's Day in a crowded train station. Some protesters lay on their stomachs, saying they were showing solidarity with Grant, who was shot in the back as he was face-down on the floor at a train station. Several witnesses caught the incident on camera, and there have been numerous demonstrations this week. The protests turned violent Wednesday night after Grant's funeral and following an announcement by authorities that Officer Johannes Mehserle, who is implicated in the shooting, had turned in his resignation. Videos from witnesses show Mehserle shoot Grant in the back as another Bay Area Rapid Transit officer kneels on Grant. A BART spokesman has said there is more to the story than what can be seen on the grainy images. Watch the events preceding the shooting ยป Oakland police tried to keep protesters at bay Wednesday night as they smashed car windshields and storefront windows. KTVU footage shows one protester jumping up and down on a police car hood, while another demonstrator pushes a flaming Dumpster up against it.