KABUL, Afghanistan — Taliban gunmen and a suicide bomber unleashed a wave of violence in the capital and beyond on Saturday, killing six Afghan soldiers aboard a Kabul bus, assassinating a Supreme Court official and shooting to death 12 men working to clear land mines in Helmand Province.

The attacks underscored what has been an exceptionally violent fall in Afghanistan, a departure from past years when violence has typically slowed during the cold months. Recent attacks have also heightened feelings of fear and uncertainty permeating the capital, as the new administration of President Ashraf Ghani struggles to appoint a cabinet.

In the last month, insurgents have claimed responsibility for attacks during a performance at an elite Kabul high school, on a British Embassy vehicle, on the compound of an aid group and against a prominent member of Parliament. Perhaps most unsettling, a suicide bomber infiltrated the Kabul police chief’s heavily fortified offices just over a month ago in an attempt to assassinate him. That attack, which killed another police official, was the first in the wave of assaults that have left Kabul feeling under siege.

Saturday’s attack on the soldiers, which occurred around 4 p.m. in southwest Kabul, only amplified that feeling. Six soldiers on the bus were killed and 10 were wounded by a suicide bomber. Details about civilian casualties were not immediately available. It was the second targeted attack against Afghan soldiers in Kabul within a week. Two days earlier, five soldiers were killed in a similar fashion.