At least seven people have been killed and 21 injured by three blasts that rocked the Afghan capital on Thursday ahead of the election.
So far no group immediately claimed responsibility for the attacks.
The attack took place three days before the official campaign season for the September 28 presidential election gets underway.
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According to the reports of the interior ministry spokesman Nasrat Rahimi, the first blast came around 8:10 am when a suicide bomber riding a motorcycle hit a bus in eastern Kabul. Reportedly, the bus belonged to the ministry of mines and petroleum.
Rahimi said two other blasts had occurred, including a car bomb, also in eastern Kabul.
According to a UN tally, at least 3,804 civilians lost their lives in the war in 2018, including 927 children.