A suicide bomber detonated his car at a checkpoint near the entrance to Kabul International Airport, killing four people and wounding 15 others, Afghan officials said.
One of the injured is a child, the Afghan health ministry said.
The Taliban claimed responsibility for the attack.
The explosion Monday took place after three separate attacks in Afghanistan killed more than 50 people on Friday.
CNN’s Masoud Popalzai reported from Kabul, and Jethro Mullen wrote from Hong Kong.