The station agent reported that a male had barricaded himself inside the station restroom, and was refusing to exit. The man, who was a chronic transient known to the agent to carry knives, claimed that people were trying to kill him. Officers arrived and attempted to get the man to exit of his own free will, but he refused. Officers attempted to unlock the door from the outside, but the man forced the lock closed. Ultimately, Berkeley Fire Department personnel were able to remove the ventilation screen from the bottom of the door, and the man surrendered without further incident. The man was transported to Alta Bates Hospital for psychological evaluation/treatment.