The death toll from a militant hijacking of a train in Pakistan's southwestern mountains has risen to 31 soldiers, staff and civilians, the military said on Friday as it accused India and Afghanistan of backing the insurgents.

The train hijacking in south-western Pakistan represents a major escalation in the region’s long-running insurgency.

Baloch separatists who hijacked a Pakistani passenger train claimed to have executed all 214 military hostages after their deadline to exchange them for Baloch political prisoners expired. The Baloch Liberation Army (BLA) accused the Pakistani government of ignoring their ultimatum,