With the massacre perpetrated by a former employee of the shipping company FedEx in Indianapolis, in which he killed eight people before taking his own life, the US reached 45 mass incidents of firearms attacks in a month.
On March 16, an individual murdered eight people in massage parlors in Georgia.
So far this year, the United States has recorded at least 147 incidents of mass shootings with firearms, defined by CNN as those in which at least four people were injured or killed by firearms, not including the attacker.