At least two people were killed while four others sustained injuries after a gunman opened fire on Tuesday night (local time) in the University of North Carolina campus.Of the four who were injured, two are being treated for "life-threatening injuries," reported CNN.Police said a person has been taken into custody in connection with the shootout.The University of North Carolina, which has around 30,000 students, has been under lockdown following reports of the shooting.Further details are awaited.