The Hadley Police Department is investigating a $16,000 theft from an unlocked tractor trailer truck outside Primo's Pizzeria.
Police tell CBS 3 Springfield the theft was reported just after 2:30 Wednesday afternoon.
When the truck drivers came back to their vehicle from a delivery they had discovered that a backpack containing the money was missing.
Officers called in canine units to help in the investigation and are reviewing surveillance video.
Hadley police say the investigation is ongoing.
Copyright 2014 WSHM (Meredith Corporation). All rights reserved.