Walmart's CEO announced that the retailer is discontinuing sales of short-barrel rifle ammunition such as the .223 caliber and 5.56 caliber, discontinuing sales of handgun ammunition and discontinuing handgun sales entirely in Alaska.

"We know these decisions will inconvenience some of our customers, and we hope they will understand. As a company, we experienced two horrific events in one week, and we will never be the same," he added.