Gabrielle Arsiaga/News-Sun Investigators with the Hobbs Fire Marshal office are still investigating two suspicious Hobbs residential structure fires that happened on Jan. 6 and Jan. 9. Hobbs Fire Department Chief Barry Young said both fires are being investigating “under a suspicious nature.”  Firefighters responded to the two vacant residences fully involved in flames — one around 10:52 a.m., Jan. 6 …