PELLA, Iowa (AP) — A 66-year-old southern Iowa man was identified as the driver of a pickup truck that crashed into a southeast Iowa Wal-Mart, killing three and injuring himself and another man in what officials believe was an accident. The truck was traveling fast enough to break through concrete posts intended to protect the entrance from vehicles, well into the grocery portion of the store before coming to a rest after hitting a refrigerated produce display. Officials declined to comment on whether a medical condition or some other issue caused the crash Friday, citing the ongoing investigation.