The officials further added, the incident took place around 1 pm local time on Saturday after the vehicle of a former Afghan senator Haji Khairullah Aqa struck with a roadside bomb Khaama Press reported.
Provincial police chief spokesman Farid Ayel confirming the report said, the explosion took place in De-Yak area while former Afghan senator Haji Khairullah Aqa was on his way towards his home.
Mr. Ayel further added, Haji Khairullah Aqa was killed along with a tribal elder Sharafuddin Khan and 2 Afghan national police service members.
No suspect has been detained in connection to the incident and Afghan police forces have launched a search operation to detain those involved behind the explosion, Farid Ayel said.
No group including the Taliban militants have so far claimed responsibility behind the incident.
Taliban militants and other insurgents groups frequently use improvised explosive device and roadside bombs to target Afghan and coalition security forces and Afghan government officials.
Source : Afghan Voice Agency (AVA), Kabul