All had used false identities to claim refugee status in Germany, authorities said.
A series of new court filings help explain why Turkey's president is so angry over the prosecution of Reza Zarrab.
The worries European authorities once had about the impact of returning ISIS fighters have been overshadowed by the sheer number of locally generated incidents.
European security officials say they have little interest in helping their nationals return home from the battlefields of Syria and Iraq.
French police have confirmed that Younes Abouyaaqoub made a trip to Paris five days before he killed 13 people on Barcelona's Las Ramblas.
The survivors of the cell that killed 15 people near Barcelona were in court on Tuesday. But investigators still worry they don't know who led the plot.
Turkey has arrested a number of US and German nationals and is using them as bargaining chips to force the return of suspected coup plotters, according to Western officials.
Authorities shot dead Younes Abouyaaqoub, 22, who had been the target of a manhunt since Thursday's deadly attack, which killed 15.
Any similarities between the car attacks championed by ISIS and its sympathizers and the deadly attack in Virginia on Saturday will come down to planning, experts say.
Friday’s G20 summit in Hamburg was the first time in 16 years that the leaders of the world’s 20 largest economies had gathered in a city, and German authorities anticipated trouble. In the end, the clashes were milder than expected, thanks to tactics that isolated the most aggressive anarchists.
German police blasted protesters with water cannons in Hamburg, Germany, as thousands marched in the street to protest the G20 summit. More the 70 officers were injured.
The “shocking” breach of confidence seen in the Manchester investigation won’t affect longer-term intelligence sharing, UK officials, intelligence experts, and European security officials told BuzzFeed News.
Even some officials in Washington were frustrated by the fact that the information was coming from the US rather than the UK, calling it “unprofessional.”
Sources tell BuzzFeed News that US commandos have engaged in combat with ISIS during a secret deployment to southern Syria that has them living alongside the rebels they’re instructing.
Before Sebastian Gorka was an adviser to President Donald Trump, he was a man with a dream to rise to the top of Hungarian politics. It didn’t quite work out.
“They talk with each other; they probably play some soccer with each other," one analyst told BuzzFeed News of the base hit in Thursday's US missile strikes. "Obviously they coordinate to a certain extent.”
A restive region struggles with a fading EU, the arrival of the Trump administration, and the rise of Russia.
“It’s hard to be allied with someone who wants to destroy you,” one diplomat in Brussels told BuzzFeed News.
“It's a wake-up call to European leaders that counting on America isn't currently a smart policy,” one European intelligence official said after the sudden resignation of the US national security adviser.
Europe’s intelligence officers fear Trump’s erratic statements and tweets could expose their secrets. “Our leadership might be less willing to share important information that's sensitive for fear of seeing it on Twitter,” an official told BuzzFeed News.