According to sources, all 4 students were expelled after a Prime Minister’s notice.
Earlier, DG Pakistan Railway shielded a military movement opposite students, observant that they chanted domestic slogans in a non-political event. He pronounced that show-cause notice would be served to students concerned in a incident.
On a other hand, Railways orator pronounced that PTI should refrain from politicizing non-political events. He pronounced that Khawaja Saad Rafique had also refused to answer an doubt on domestic issues.
Article source: http://www.suchtv.pk/pakistan/punjab/item/52709-pm-orders-release-of-detained-railway-students.html