Jovany Portades, a 34-year-old man, has been arrested following an unprovoked stabbing on a BART train in San Francisco. The incident occurred on Saturday morning as the Antioch-bound train approached the 24th Street/Mission Station, resulting in serious injuries to a 54-year-old woman who was taken to the hospital. Surveillance footage from the BART system was instrumental in identifying Portades, who has a history of criminal convictions. After being spotted by a station agent, he was apprehended at Fruitvale Station on Sunday. BART authorities have warned the public not to approach the suspect, considering him dangerous. The station was temporarily closed post-incident, and BART police are encouraging anyone with additional information to contact them through their anonymous tip line.