The shooter is believed to be holed up inside an apartment. A SWAT team has been called in, and authorities have evacuated residents in surrounding homes.
Two deputies went to the north Modesto home to deliver the notice when the shooting happened around 11 a.m., Stanislaus County Sheriff Adam Christianson said.
Christianson said it's not immediately clear how the civilian died because he didn't think his deputies had returned fire.
Christianson told reporters he hoped to end the standoff "without further tragedy or death."
