terrorism

It's a simple, frequently recurring phrase: "The Islamic State has claimed responsibility for the attack." But it raises some questions: Is the claim credible or just an empty assertion, and if it's true, what does "responsibility" actually entail?

Experts who closely follow the Islamic State say that in general when it comes to attacks in the West, an ISIS claim of responsibility usually means there was some sort of connection. But the attack might have been planned, funded and directed by ISIS — or it could just have been inspired by the group's propaganda.

Updated at 11:40 p.m. ET

The father and younger brother of suspected Manchester Arena suicide bomber Salman Abedi have been arrested in Libya.

Updated at 5:55 p.m. ET

One day after a bombing at an Ariana Grande concert in Manchester, England, killed at least 22 victims and wounded dozens more, police have identified a suspect: Salman Abedi, 22, who also died in the attack. The Greater Manchester Police says it's investigating whether anyone helped to carry out the attack.

Updated at 8:05 p.m. ET

One police officer is dead and two seriously wounded after a shooting on Paris' famous Champs Elysees, in an incident that left one attacker dead. The assailant reportedly targeted a police vehicle. Authorities say a bystander was also wounded.

French prosecutor Francois Molins said the authorities have identified the shooter and are assessing whether the attacker had accomplices. Raids and searches were ongoing, Molins said.

Along the Chari and Logone rivers separating Cameroon from Chad's capital, four flat-bottomed boats, mounted with machine guns, brimming with Chadian and other special forces, round the curve as they approach the riverbank.

Forming an assault force, heavily armed soldiers leap out of the vessels and race up a slope to take up positions while backup forces have their machine guns at the ready.

R
Fredrik Sandberg

Last year a driver mowed down a crowd that was gathered to celebrate Bastille Day in Nice, France. He killed at least 84 people and injured scores more.

Last December, another attack involved a truck — this time in Berlin, the German capital. The attacker drove into a Christmas market, leaving 12 people dead and 56 injured.

Updated at 4:40 a.m. ET Saturday

A suspect in Friday's truck attack in Stockholm has been arrested, according to a Swedish prosecutor.

Police in Sweden say the man they have arrested is "likely" the driver of a truck which drove into pedestrians on a major shopping and tourist street in Stockholm, causing multiple injuries and fatalities.

Authorities in New York have charged a white supremacist from Baltimore with terrorism over the murder of a black man last week.

Police say 28-year-old James Jackson of Baltimore traveled to New York City specifically to kill black men.

It was a plan he carried out on Monday, stabbing 66-year-old Timothy Caughman to death on a public street corner, police say.

The Associated Press reports that Caughman was remembered "as a gentleman and a good neighbor."

Updated at 5:30 p.m. ET

The man who is believed to have carried out a deadly attack near the U.K. Parliament has been identified by Britain's Metropolitan Police as Khalid Masood, 52.

Police believe the man acted alone. He was shot and killed after carrying out an attack that killed a police officer and three civilians and wounded several others around 2:40 p.m. local time Wednesday. (Two of the civilian victims died on Wednesday; the third was hospitalized after the attack and died Thursday.)

Updated at 4:30 a.m. ET Thursday

British authorities have made eight arrests in their investigation into Wednesday's attack in London, police said Thursday morning.

Mark Rowley, the national lead for counterterrorism policing, told reporters that there were four dead, including the attacker, and 29 people have been treated in hospitals. Seven people are in critical condition, he said.

Police had earlier said there were five dead including the attacker.

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