The incident did not impact the airport's operations since the ordnance did not have the capability to explode, the Port says.

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.

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.