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Bystanders watch as emergency responders remain at the scene where the Oakley Police Department reports that an 11-year-old boy fatally shot himself on Wednesday, Jan. 22, 2014, on the in the 1300 block of Yosemite Circle in Oakley, Calif. (Susan Tripp Pollard/Bay Area News Group)

OAKLEY -- The death of an 11-year-old boy who died after shooting himself at an Oakley home on Wednesday night was not an accident, authorities said Thursday.

Although investigators initially believed the boy shot himself accidentally, they are now saying the boy intentionally shot himself.

The Contra Costa County Coroner's Office performed an autopsy on the boy early Thursday morning.

Police were called to the home just after 7 p.m. on Wednesday.