A dramatic escalation in the tactics by a Baloch separatist group came with the hijacking of a passenger train on Tuesday.

Attacks targeting security forces are increasing in frequency and lethality in Pakistan’s southwestern province of Balochistan, where a separatist militant group has adopted new tactics.

Oil- and mineral-rich Balochistan is Pakistan's largest but least populated province. It's a hub for the country's ethnic Baloch minority, whose members say they face discrimination and ...