Deadly shootings are rising in the U.S., reversing nearly two decades of a downward trend, according to a new report from the Centers for Disease Control and Prevention cited Friday by the St. Louis Post-Dispatch. The report analyzed nationwide gun-related deaths and found a rise in gun homicides between 2015 and 2016. During that period, 27,000 people died from gun homicides, compared to 23,000 between 2012 and 2013. The study also reported that the number of deadly shootings had risen across all age groups, as did the number of suicides—which increased by 21 percent from the preceding decade. The report noted, however, that it’s not clear if these increases are short-term spikes or if they are indicative of longer-term national trends. The report, published Thursday, came just hours after the Thousand Oaks massacre, in which a gunman murdered 12 people at a college bar night in Ventura County, California.