Patrons on board a Pittsburg bound train reported a couple involved in a verbal and physical altercation while the train was between South San Francisco and Colma Stations. The female party was identified by witnesses as the primary aggressor. Officers intercepted the train at Glen Park and detained both parties. Their investigation determined that the couple had a child together. The male victim was not injured. The female was arrested for misdemeanor domestic violence and was booked at the San Mateo County Jail. The Pittsburg train was delayed about 15 minutes as a result of this incident. The male victim was uncooperative and refused all domestic violence resources.