Balochistan's long-standing insurgency reached a new level, with the Baluch Liberation Army seizing a passenger train. The militants killed 21 passeng

ISLAMABAD — Pakistan’s neglected southwestern province of Balochistan has been the scene of a yearslong insurgency, with a dramatic uptick in attacks in recent years underscoring the struggles the government in Islamabad faces in dealing with myriad security threats.

Pakistani security forces are carrying out a rescue operation to free dozens of passengers taken hostage by separatist militants who hijacked their train in the southwest of the country on Tuesday. Here is a look at what happened,