NEW : two dead in Himalayan gunfights between Pakistani troops , separatist militants . Incident comes after Srinagar accuses Indian troops of firing on Indian troops . Kashmir has been in throes of separatist campaign for 20 years .
NEW : 25 dead in Kashmir gunfights between Indian troops , separatist militants . Incident comes after India accuses Pakistani troops of firing on Indian troops . Kashmir has been in throes of separatist campaign for 20 years .