counterterrorism
Most were released and investigators are keeping 216 suspects in custody.
Concern over the small European nation's ability to handle its worsening Islamic militant threat came to the fore following Tuesday's ISIS attack.
That's helped it suspend over 125,000 accounts since mid-2015.
The 23-year-old had been under investigation since September.
WHAT'S HAPPENING
The woman says that without Twitter, the terrorist group's "explosive growth" would not have been possible.
It's just as hard to catch would-be terrorists as it as to prevent mass shootings.
Pennsylvania teen Jalil Ibn Ameer Aziz was arrested Thursday.
FBI Director James Comey said the couple expressed support for "jihad and martyrdom" in private communications but never did so on social media.