A glitch in the Electronic Benefits Transfer system resulted in chaos and the need for police assistance at a couple Wal-Mart stores in Louisiana Saturday, according to local reports.

A snafu during a routine system update by vendor Xerox over the weekend left EBT card — the vehicle for government benefits like food stamps — users in 17 states unable to use their benefits cards.

The system was back in service within a day, but not before Wal-Mart stores in Springhill and Mansfield, LA saw the shelves cleared when the stores began allowing people to use their EBT cards without limits.