A victim reported that a male suspect (BM, 6'1", blue sweatshirt, goatee) grabbed his cell phone from his hand and then threatened him with physical violence. The victim off boarded the train to make the report. The train was searched at the West Oakland Station, resulting in a 20 minute delay. The suspect was not located. The victim was not injured during the incident. The phone was not able to be tracked. Station and train video will be requested.