The administrative chief of Bagram Ahmad Shafi said the incident took place after a magnetic bomb was detonated in a police vehicle.
He said an investigation is underway regarding the incident but did not say anything regarding the casualties.
However, another official in Bagrami district said a policeman has lost his life and two others were wounded in the explosion.
No group including the Taliban militants has so far claimed responsibility behind the incident.
This comes as at least 33 people lost their lives and 80 others were wounded in a coordinated suicide attack in the outskirt of Kabul late last month.
The incident took place in Company area of the city after a suicide bomber targeted the vehicle convoy of the Afghan police cadets followed by another suicide attack.
The Taliban group claimed responsibility behind the incident which was the second largest attack carried out by the group since they announced their spring offensive.
Earlier, at least 64 people were killed and 347 others were wounded after the militants attacked the VIP protection unity in the city in April.