Maulvi Umar from bajaur who was the deputy ameer of ttp has been removed from his position, most probably due to his support for peace talks with the government. It’s believed that mehsud is not favor of peace talks until the drones strikes continue. There has been a recent spike in terrorist activities through out the province of khyber pakhtunkhwa.
actually according to the news, he had started talking to the Pakistani government unilaterally. Mehsud is against any such talks, thats the reason for the firing. According to the NYT article this ahs created a rift in teleban.