A vigil was held Monday night for the teen gunned down in a Flatlands shooting over the weekend.

The shooting prompted community leaders in Brooklyn to call for an end to gun violence after five people were shot during a 12-hour span.

Isiah Joseph, 15, was fatally shot Sunday on Avenue H near East 56th Street. A 20-year-old was also injured in the shooting. Police are investigating the possibility that the shooting was gang-related.

Community advocate Tony Herbert saied the teen's murder and the other shootings should be a wake-up call for politicians, police and the community itself.

"We have to get these guns out of here immediately. I'm calling on all our elected officials, all of our leaders in the community...we have to get to a table and come to some resolve," said Herbert. "We have to make sure that these people understand that we mean business."

Police say a surveillance camera shows three suspects who fired multiple shots at Joseph and the 20-year-old man. They are hoping the footage will lead to arrests.

According to Herbert, the double shooting may be an act of retaliation. He also told News 12 that the 15-year-old had been shot before.