The victims were part of a security unit providing protection to teachers who had to travel between their homes and school in the district every working day.
The explosion was caused by an improvised explosive device weighed about seven kilogrammes buried under the road which was detonated by a cellphone. The blast dug a hole about 80 cm deep and 80 cm wide on the road.
The two injured rangers were later taken to the provincial hospital for treatment.
Meanwhile, the Internal Security Operations Command has approved a pilot project to produce LPG tanks with composite material instead of steel tanks which have been widely used by the insurgents to make bombs.
The new gas tanks will be made by AP Gas and Oil Company and meant to be used in the three troubled southernmost provinces.
ISOC’s forward command has conducted tests of the prototype composite-based tanks by subjecting them to gunfires and bomb blasts. Although the new tanks can be used to make bombs, their explosions are less powerful than similar blasts from steel tanks.