An Oakland police car was stolen while officers were investigating an alleged assault on Friday night.
The suspect hopped into the cruiser around 8:30 p.m. as officers responded to the call about an assault on Lake Park Avenue.
The thief, identified only as a man, was chased by police to Vallejo and was arrested after crashing into a light pole.
It's unknown if the alleged stolen car driver was injured.
No other information was immediately available.