At least seven people were killed and 20 others wounded when an explosion happened in capital Kabul on Tuesday, police said.

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The blast happened in a commuter bus in Dasht-e-Barchi area of the city, Khalid Zadran, the city’s police spokesman, said.

There was no immediate claim of responsibility for the blast.

It comes nearly two weeks after a blast hit a sports club in the same area, killing four people.