The Taliban drove an ambulance packed with explosives into a crowded Kabul street on Saturday, setting off an enormous blast that killed at least 95 people and injured 158 others, adding to the grim toll in what has been one of the most violent stretches of the long war, Afghan officials said.

The attack came days after a 15-hour siege by militants at the Intercontinental Hotel in Kabul that left 22 dead, including 14 foreigners.