Central Valley High School and the surrounding area were under evacuation Friday morning as deputies responded to a bomb threat related to a domestic disturbance.
Two suspects, 44-year-old John Francis Decker and 44-year-old John Robert Evans, are in custody.
A woman called the Shasta County Sheriff's Department around 3 a.m. Friday morning, claiming she had been assaulted at a home on Los Gatos Street. Deputies said they responded to the call, but couldn't find her.
They got a second call from the same woman around 5:30 a.m.. This time she said she had been assaulted with a pipe and that there were people with her who had explosives.
Deputies said when they arrived at the house, the people inside wouldn't come out, but they sent their dog. The said the dog charged at them and their K-9, forcing them to shoot the Shepard-mix dog.
The Shasta County bomb squad and SWAT team responded to the scene and checked a few suspicious items, including a backpack. All items were rendered safe.
A Gateway Unified School District official said Central Valley High School remained closed for the rest of the day. Other Gateway schools had classes as scheduled.
All roads are now open and residents are allowed to return to their homes.
Deputies said the dog is being treated at a local vet and is expected to survive.