One person is in custody after a suspicious house fire in Cambridge Thursday night. Crews were called to Dexter Road around 10:30 p.m.Cambridge Fire Chief Robert Folsom tells TV5 a man and a woman made it out of the house and no one was hurt. Folsom says flames were shooting out of the windows when crews arrived. The fire spread to the upstairs and the attic. Firefighters managed to save the house but it has significant damage.Folsom says authorities with state police and Somerset County were also called to the scene and are investigating the fire. No word yet on who is in custody.