Maricopa police said it's investigation into a suspicious package outside a post office has been "resolved."
A police spokesperson said the suspicious package ended up being a Bluetooth speaker that had a low battery and was making a "ticking" noise inside a trash can.
The trash can amplified the sound and that's when police were called.
Police and bomb technicians responded to the Post Office off Hathaway and Wilson avenues.
The device was blown up with a large charge, said police.