Chicago police issued a bulletin Monday warning its officers about gangs armed with high-powered weapons, after three people were shot to death over the weekend – including two attending a memorial for the earlier victim. Department spokesman Anthony Guglielmi said the three people who were killed in the shootings Sunday were all members of the same street gang.

A shooting early in the day left one man dead, and the two others were killed and eight people were injured in a spray of more than two dozen shots from two guns while attending a makeshift memorial for him. Police suspect they were all shot by members of a rival street gang in the same neighborhood on Chicago’s southwest side. READ MORE