Two workers shot dead at Wal-Mart

GLENDALE, Ariz. -- Two Wal-Mart employees were shot to death Tuesday as they gathered shopping carts in the parking lot of one of the retail stores in suburban Phoenix, and police later arrested the suspected gunman.

The suspect, described as being in his 50s or 60s, still needed to be put through a lineup and questioned by detectives. His name was not released Tuesday evening.

There was no immediate word on what might have motivated the attacks.

"We don't know how this happened or what led up to it," Pena said. He would not say whether the man knew the victims, who were also men.

Delia Garcia, a Wal-Mart spokeswoman on the scene, said the two victims were collecting shopping carts when the gunfire broke out. She said the store would be closed at least until Wednesday.

"This is an extremely tragic situation," company spokeswoman Sharon Weber said from Wal-Mart headquarters in Bentonville, Ark.

Authorities initially kept customers inside the store, but they were later allowed to leave.

Lisa Crider said the store was filled with screaming people who were trying to get out. "It was just pure chaos," she told The Arizona Republic. Crider said she initially tried to stay inside the store but later fled.

Some of the store's 450 employees could be seen leaving the business Tuesday evening. The company was working to get help for other employees upset by the shootings, Garcia said.

Police cordoned off much of the parking lot, telling anyone whose car was within a perimeter that they would have to leave their vehicles there.

Glendale is about eight miles northwest of downtown Phoenix.