Weekend rain unearthed a practice warhead in a Hillcrest backyard Sunday prompting an hours-long bomb threat investigation.

San Diego Fire Rescue (SDFD) says that a homeowner found a 2.75-inch practice rocket warhead in the backyard of their home at 3729 Dove Street and called 911 just before 3 p.m.

SDFD hazmat crews were investigating the rocket initially until crews from Marine Corps Air Station (MCAS) Miramar took over.

Crews were unable to determine if the warhead was live or not, but after testing it they determined that it was safe to be transported for destruction.

SDFD said that the investigation did not confirm if the warhead contained anything and its contents will remain unknown until further tests are completed.