A car bomb was detonated outside of a government building in Kabul, Afghanistan on Dec. 24, and it was followed by an attack on the building by militants, who took civilians in the building hostage during the attack. A 7-hour siege by Afghan security forces ended the attack, during which 43 people were killed, including at least one police officer and three attackers, with 25 people wounded.

At press time, no group had taken responsibility for the attack, but officials believe the...

In central Strasbourg, France, on Dec. 11, a man attacked pedestrians with a gun and knife, including some in a Christmas market, killing three people and wounding 10 others. Three of those 10 died from their wounds within the next week.

The gunman was wounded at the scene in a shootout with security forces but escaped. He was found after a 2-day manhunt and was killed in a second shootout with police. The man was identified as a native-born French citizen with a long criminal history...

In Bottrop, Germany, a man drove a car into a group of people celebrating New Year's, some of whom were refugees from Syria and Afghanistan, injuring four people. Before that incident, the same driver had attempted to strike a pedestrian, who dodged the attack, and also attempted to target a group of people at a bus stop in the nearby city of Essen.

When the man was arrested, still in his car, he made racist and xenophobic remarks to police, leading authorities to believe that he...