The latest mass killing in the United States occurred Saturday night when three children ages 8, 9 and 14, and a 21-year-old adult were killed in a shooting at a child’s birthday party in California. Eleven people were also wounded at a Stockton banquet hall.

This is the country’s 17th mass killing this year. The killings are tracked in a database maintained by The Associated Press and USA Today in partnership with Northeastern University.

See Full Page