A magnetic bomb explosion took place in Pul-e-Sokhta area in capital Kabul on Sunday.
Two employees of the water supply department were killed when a magnetic bomb was detonated targeting a vehicle of the water supply on May 13, Tolo News reported.
No group has so far claimed responsibility for the explosion.
Afghanistan is one of the world's largest sources of opium and the drug addicts take shelter under Pul-e- Sokhta bridge in the western part of the capital.
As many as eight people were killed in an attack when a suicide bomber targeted a vehicle convoy of the coalition forces the vicinity of Macroryan area of the city on May 2.
The Islamic State of Iraq and Syria (ISIS) terrorist group's offshoot in Afghanistan, ISIS Khurasan has claimed responsibility of the suicide attack.