Kabul warned of ‘unbearable punishment’ as clashes persist along border

• Torkham stays shut for five hours following firefight over disputed check post • Military spox says Afghan Taliban ‘won’t be able to bear cost’ of harbouring terrorists • Names India as ‘prime contractor’ behind terrorism in Pakistan • Rubio says US shares Pakistan’s concerns over attacks from Afghan soil, open to role in easing tensions KHYBER/LOWER SOUTH WAZIRISTAN: Pakistani and Afghan border forces exchanged fire at several points along their border on Sunday, as the military warned that the Afghan Taliban would not be able to withstand the “punishment” Islamabad could inflict if Kabul…