Construction workers at the San Diego International Airport’s Terminal 1 dug up a grenade Thursday, prompting a response from law enforcement. The grenade was old and inert, meaning it had been hollowed out as a training tool and did not have the potential to explode,

Before the new Terminal 1 opens later this year, people should plan for another round of construction-related traffic interruptions when driving in and out of the airport.

In a surprising discovery, construction workers at San Diego International Airport unearthed what they believe to be "an old, inert hand grenade" in the area of Terminal 1, a spokesperson for the Port of San Diego confirmed Thursday afternoon.