UPDATED, 4 p.m.: Arcadia police said the suspicious package at the Westfield mall contained marijuana.
UPDATED, 1 p.m.: Sgt. Dan Crowther says the package is not an explosive, but police are still trying to determine what it is. Meanwhile, police have cleared the perimeter around the package and normal activity has resumed.
UPDATED, 12:30 p.m.: The suspicious package is no longer a threat, the APD announced via Facebook. Investigators are still trying to determine the nature of the package and its contents.
UPDATED, 11:20 a.m.: The bomb squad has deployed a robot to take a closer look at the package. Arcadia police have not evacuated the mall, despite media reports stating otherwise. Sgt. Dan Crowther says police have set up a perimeter around the package.
Original: The Los Angeles County Sheriff's Department bomb squad is at the Santa Anita Mall investigating a suspicious package found Thursday.
The call reporting the package came in to Arcadia police at 9:52 a.m., according to scanner reports. Mall security found the package a parking lot on the north side of the mall, near JC Penney, Arcadia police Sgt. Dan Crowther said.
When Arcadia police officers could not identify the package, they called the bomb squad, police spokeswoman Patty Barragan said.
Patch will update this story as more details become available.