Construction workers at the San Diego International Airport’s Terminal 1 dug up a grenade Thursday, prompting a response from law enforcement.

NBC 7 reported that construction workers at the San Diego International Airport's Terminal 1 dug up a hand grenade. The grenade was later found to be an old inert training tool that posed no threat to anyone as it did not have the potential ever to explode.

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

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.