Tragedy unfolded inside a Walmart store in Hayden, Idaho, this morning when a 2-year-old boy accidentally shot and killed his mother, reports the Coeur d'Alene Press. Police say the toddler was in a shopping cart when he reached into his mother's purse and somehow discharged a handgun inside, reports the AP. "It appears to be a pretty tragic accident," says a Kootenai County sheriff's spokesman. The 29-year-old victim remains unidentified, but authorities say she was in town visiting relatives. She had a concealed weapons permit. (More Idaho stories.)