A woman called police to report seeing two men arming themselves before entering the store. However, a search of the premises turned up no sign of the pair. A review of the store's security camera footage also came up empty, according to police spokesperson Nicole Acker.
She said it's possible the witness saw employees outside on a break holding price ticket guns or box cutters. Police planned to re-interview the witness Monday evening.
The Palo Alto Police Department and San Mateo County Sheriff's Office also responded to the call.