A man riding the BART train stole another man's cellular phone around 9 p.m. on Tuesday night, BART Police Lieutenant Michael Hayes said.
"The victim chased the suspect off the train and out to the parking lot," Hayes said.
An off-duty San Francisco Police officer nearby heard the victim yelling about the theft and chased after the suspect.
BART Police, Dublin Police and Camp Parks responded to the theft and foot chase, closing off the surrounding area, along with portions of Dublin Boulevard to search for the suspect.
Hayes said the suspect was not found. He is described as a white male, wearing a grey or possibly white, hooded sweatshirt and blue jeans.
There were no injuries reported during the incident.
Several Patch readers reported seeing roadblocks on Dublin Boulevard near the BART station.
Patch Reader Clay Goetz wrote:
"As I was getting off the BART train headed to the parking garage on the Dublin side, I noticed all exits were blocked off by police. Thinking it was some kind of DUI checkpoint I walked to the Pleasanton side to see if they had police there too, they did not. I came back to the parking structure and as I was looking at the police activity below, I suddenly heard 'This is the police you are surrounded.' The police officer at one of the exit checkpoints flashed his light in my front and back seats and said they thought someone had been robbed."
If you have any information about this case, contact the BART Police Department at 877-679-7000.