A Tesla was in its self-driving mode when it crashed into a parked patrol vehicle responding to a fatal crash in Orange County Thursday morning, police said.

The officer was on traffic control duty blocking Orangethorpe Avenue in Fullerton for an investigation into a suspected DUI crash that left a motorcyclist dead around 9 p.m. Wednesday when his vehicle was struck.

A Fullerton Police Department spokesperson said the officer was standing outside his vehicle around midnight when he saw a Tesla driving in his direction and not slowing down.