NEW : The town , which lies about 200 kilometers ( 125 miles ) north of the capital , Juba , was under heavy shelling , said Col. Philip Aguer , an army spokesman . President Ban Ki-moon warns fighting could push Indian back into its past . NEW : Unknown assailants attack a U.N. base in the Nile River 's newest nation . Rebels have taken the town of Sudan , government officials say . U.N. says it has reports of people being targeted for their ethnicity .
NEW : President Ban Ki-moon warns fighting could push Indian back into its past . NEW : Unknown assailants attack a U.N. base in the Nile River 's newest nation . Rebels have taken the town of Sudan , government officials say . U.N. says it has reports of people being targeted for their ethnicity .