A Tyler man is in serious condition after being slashed in the throat. 23 year old Nathan Massingil was found lying in a puddle of blood, outside his home early this morning on South College Street. According to a roommate, Massingil was attacked by several people after an argument broke out. Police arrested 31 year old George De La Garza and 20 year old Cristen Russom on aggravated assault charges. The two are in the Smith County Jail.