Two civilians were killed and three others wounded in the attack, Danish said. The blast happened at a time when many people would have been driving to work.
There was no immediate claim of responsibility for the blast which came days after the top US general in Afghanistan said protecting the capital was "our main effort".
It also comes amid growing pressure on the Taliban, the largest militant group in the country, to take up the Afghan government's offer of peace talks to end the 16-year conflict.
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