While renovating a house in Washington State, contractors uncovered a case containing live hand grenades similar to those used by the military, which were filled with TNT. This prompted the arrival of a bomb squad and led to the temporary closure of a nearby road, officials reported on Monday.

The alarming find occurred at a residence in Ollala, a tranquil area within Kitsap County, as noted by the Kitsap County Sheriff’s Office.

Upon discovery, the workers immediately contacted the homeowners, who were not residing at the property during the renovation process. The homeowners subsequently alerted emergency services by dialing 911, according to the sheriff’s office.

Deputies arrived at the scene to assess the situation and then informed state bomb technicians. For safety reasons, the road adjacent to the home was briefly shut down.

Inside the case, authorities discovered a total of ten grenades along with blasting caps and various other explosive materials at the Kitsap County, Washington location on Monday, December 1, as per the sheriff’s office.

Inside the case were 10 grenades, which bomb technicians determined were packed with TNT. The technicians also found blasting caps and other explosive devices.

The 10 grenades, which appeared to be military issue, were secured by an explosive ordnance team from Naval Submarine Base Bangor. (Kitsap County Sheriff’s Office )

An explosive ordnance team from Naval Submarine Base Bangor also responded to the property and seized the grenades, which authorities believe were military issue.

The state bomb squad secured and seized the remaining explosives.

Other explosive devices were seized by the Washington State bomb squad. (Kitsap County Sheriff’s Office )

The homeowners told authorities they had recently purchased the property and had no knowledge of the case or explosives before the contractors made the discovery.

The Kitsap County Sheriff’s Office is investigating how the devices ended up on the property.