Suicide bomber kills four in Kabul attack on Afghan army bus

KABUL (Reuters) - A suicide bomber attacked an Afghan army bus in Kabul on Sunday, killing four people and wounding up to 22, police said, the latest incident in a worrying surge of violence in the Afghan capital over the past 10 days.

The Taliban quickly claimed responsibility for the attack, the worst since a devastating assault on a popular restaurant on January 17 killed 21 foreigners and Afghans.