According to the security officials, the former lawmaker Dr. Asadullah Hematyar was shot dead by unknown gunmen in the vicinity of Stanikzai Meena.
The police district#6 police chief Mohammad Dawood Paktiawal said the gunmen opened fire on Dr. Hematyar near his clinic.
Hematyar was representing the central Logar province in the Lower House of the Parliament, Wolesi Jirga and was working as a physician when he was assassinated.
The main motive behind his assassination has not been ascertained and no group has so far claimed responsibility behind the attack.
The attack on Dr. Hematyar followed a day after a magnetic bomb explosion targeted a vehicle carrying the head of the HR department of the Afghan parliament, leaving him dead along with another individual.
Another prominent Afghan lawmaker Sher Wali Wardak was also killed in an explosion in Kabul city earlier last month.
MP Wardak was killed after an explosive device was planted in an electricity tower close to his residence.
The Taliban group claimed responsibility behind the attack on MP Wardak and explosion that targeted the HR head of the parliament.