Store employee Bill Sinclair tells The Elkhart Truth that Bhatti was the owner and Singh was a cashier.
Sinclair says he was in the store's kitchen when he heard a noise like the pop of a firecracker. Two girls standing outside told him that two men in masks ran from the store, and when he went back inside, he saw Bhatti and Singh had been shot.
Sinclair says Bhatti was pistol-whipped in a previous robbery.
Nearby schools were placed on lockdown for nearly two hours after the shootings.