Gunman opens fire at mall, injuring multiple people and killing unknown number

A gunman shot multiple people at an outlet mall in the Dallas suburb of Allen, Texas, on Saturday, killing an unknown number (LM Otero/AP)

A gunman shot multiple people at an outlet mall in the Dallas suburb of Allen, Texas, on Saturday, killing an unknown number.

Officials received reports of gunshots at around 3.40pm from the Allen Premium Outlets.