An explosion in the Afghan capital has killed one Afghan policeman and wounded three civilians.
Police say a bag of explosives was planted near a bridge in Kabul, but it was unclear what it was targeting.
There have been few attacks in that city since a "ring of steel" was erected in the city before a parliamentary election in September.
Last month, two militants wearing suicide vests attacked a bus of Afghan army officers in Kabul, killing five and wounding nine.
compiled from agency reports