Pakistan’s military accused neighboring India on Friday of sponsoring insurgents in a restive southwestern province, where an unprecedented attack by armed separatists this week killed 26 passengers aboard a hijacked train.

India denied accusations by Pakistan that it was involved in the Jaffar Express attack. Pakistan claimed the rebels had ties with leaders in Afghanistan. India urged Pakistan to address its internal issues instead of blaming others.

Following the hijacking of the Jaffar Express by the Balochistan Liberation Army, Pakistan’s foreign ministry spokesperson had accused India of ‘sponsoring terrorism’.