▁to ▁the ▁collision . ▁Ad vis er ▁to ▁S ind h ▁Chief ▁Minister ▁on ▁Labour ▁Senator ▁S ae ed ▁Gh ani ▁said ▁that ▁railway ▁officials ▁gave ▁a ▁green ▁signal ▁to ▁the ▁train ▁coming ▁from ▁behind ▁by ▁mistake , ▁and ▁it ▁went ▁on ▁to ▁hit ▁the ▁train ▁at ▁rest . ▁A ▁factory ▁worker ▁A j ab ▁Gul ▁told ▁to ▁media ▁that ▁he ▁was ▁on ▁his ▁way ▁to ▁work ▁when ▁the ▁accident ▁occurred . ▁“ S ud den ly ▁another ▁train ▁came ▁speed ing ▁in ▁and ▁sm ashed ▁into ▁the ▁park ed ▁train . ▁ ▁D ri vers ▁ignored ▁signals ▁Federal ▁Minister ▁for ▁Rail ways ▁Kh aw aja ▁Sa ad ▁Raf ique ▁pointed ▁to ▁the ▁neg lig ence ▁of ▁the ▁driver ▁and ▁assistant ▁driver ▁of ▁the ▁train ▁coming ▁from ▁behind ▁as ▁possible ▁cause ▁for ▁the ▁incident . ▁He ▁said ▁the ▁drivers ▁were ▁first ▁shown ▁a ▁yellow ▁signal ▁— ▁an ▁indic ation ▁to ▁slow ▁down ▁— ▁followed ▁by ▁a ▁red ▁signal , ▁" the ▁[ standard ▁operating ▁procedure ] ▁of ▁which ▁is ▁stop ▁( the ▁train ) ▁dead ▁for ▁a ▁minute ▁and ▁then ▁proceed ▁very ▁slowly ". ▁He ▁said ▁the ▁drivers ▁ignored ▁both ▁signals , ▁which ▁" app ar ently " ▁led ▁to ▁the ▁collision . ▁ ▁Re actions ▁Pakistan ▁Pe op les ▁Party ▁Chair man ▁Bil aw al ▁Bh utto ▁Z ard ari ▁visited ▁those ▁injured ▁in ▁the ▁train ▁accident ▁at ▁J inn ah ▁Post grad uate ▁Medical ▁Centre . ▁Z ard ari ▁said ▁there ▁should ▁be ▁no ▁politics ▁on ▁terror ism ▁and ▁acc idents