The Pakistani Taliban on Thursday declared an indefinite ceasefire with Islamabad, saying “substantial progress” had been made in peace talks in the Afghan capital of Kabul. Since the Afghan Taliban seized power last year, Islamabad has increasingly complained of attacks by the Tehreek-e-Taliban Pakistan (TTP), especially along the mountainous border with Afghanistan. The TTP is a homegrown movement but shares roots with the new rulers in Afghanistan, who Pakistan has claimed lets its fighters stage assaults from Afghan soil. In recent weeks peace talks have been brokered by the Afghan Taliban…