Iran Press/Asia: The policemen were killed when the bomb attached to their vehicle exploded in a central district of Kabul on Saturday, police spokesman Ferdaws Faramarz told reporters.
A civilian was also wounded in the blast, he said, Al Jazeera reported.
Two security personnel were wounded in another similar bomb attack targeting a second police vehicle in a western district of Kabul, Faramarz said.
He said a third bomb also exploded in the city but caused no casualties.
In recent months, Kabul and several other provinces of Afghanistan have been rocked by deadly violence, including bombings, rocket attacks, and targeted killings.
Several of these attacks, especially in Kabul, have been claimed by the ISIL (ISIS) group.
Journalists, politicians, and rights activists have increasingly been targeted as violence surges in the country.
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9 killed in Kabul blast