A homicide investigation is underway in Fallbrook on Monday night, officials said. Deputies responded to a call involving an assault with a deadly weapon in the 3800 block of East Mission Road around 8 p.m., according to the San Diego County Sheriff’s Office. Officials say there is one victi m. One person was detained, but not arrested, SDSO said. The investigation is ongoing. This is a developing story that will be updated as more information arrives. ...read more read less