A 52 year old Concord man entered the trackway of the Concord Station and refused to exit, violation of 369i PC. The male threatened to kill himself by jumping off the raised trackway. Train traffic was interrupted between the Concord and Pleasant Hill Station, causing major delays in train service. BART Police, Contra Cost Fire and outside agencies responded to the scene to secure the area and began negotiating with the suicidal male. After negotiations failed, approximately 0235 hours, the male was physically removed from the trackway and placed on a 5150 W&I hold. Criminal charges are pending. Train service was restored for the morning commute.