The dead is Milon Kumar Chakma, 18, son of Rashik Kumar Chakma, 40, an active member of PCJSS, sources said.

Local people and security sources said, a group of UPDF activists attacked the rice mill of Rashik Kumar. In his absence, they caught his son Milon and killed him in a brush fire.

Police recovered the body and sent it to Khagrachhari Sadar Hospital for autopsy.

Local people and security sources said the attackers demanded Tk 1 lakh as ransom from Rashik. As he refused to pay the ransom, the raiders killed his son, security sources said.

However, the UPDF district coordinator Samari Chakma denied involvement of UPDF men in the killing.

Our Rangamati Correspondent said: At least nine persons were killed and 10 others injured in clashes between the PCJSS and the UPDF over establishing supremacy in different areas of Chittagong Hill Tracts in last 15 days.

The clashes restarted on July 9 after a pause for a few months. Three UPDF activists including an elderly woman were killed and two others were injured as a group of PCJSS activists attacked their stronghold at dead of night at New Karetchhari of Kutukchhari union in Sadar upazila.

The dead are Tulumoni Chakma, Sushil Chakma and Premolata Chakma while the injured are Sontosh Chakma and Sidhe Chakma.

The July 9 incident infuriated the UPDF activists who launched attacks on the PCJSS activists. One person, Parban Chakma was killed while two others were injured in a clash at Dhudukchhari of Panchhari upazila in Khagrachhari on July 19.

The next day, PCJSS activist Kalpa Chakma succumbed to his severe bullet injuries following attack by the UPDF at Logang village in the same upazila in Khagrachhari.