An unknown person shot and killed two of them at a supermarket in Elkhart, Indiana, in the early morning.
The attacker displayed resistance to the policemen who rushed to the scene and was killed in an exchange of fire with them.
No details of the accident were available yet.
It should be noted that the United States witnesses such incidents from time to time. Perhaps the deadliest of these was the accident that occurred inside a cinema in Aurora, on the outskirts of Denver, Colorado
On that day, a man wearing a gas mask and bulletproof vest entered the showroom and fired tear gas canisters and opened fire on the spectators, killing 12 people and wounding 50 different wounds.