"More than thirty women and men have been arrested" in a sweeping anti-ISIS operation in and around the al-Hol camp, said Rami Abdul Rahman, head of the Britannia-based Syrian Observatory for Human Rights.
"The arrests are ongoing" as part of a days-long operation by the Syrian Democratic Forces (SDF), which is the Kurdish regional administration’s main fighting force, the Kurdish YPG militia and a local police force, Abdul Rahman said.
Syrians and foreigners "suspected of supporting [ISIS]" have been arrested, he said.
SDF officials confirmed the operation, with one of them saying it would run at least 10 days.
The US-led coalition battling ISIS said it was providing its SDF partners with "intelligence, surveillance, and reconnaissance" support, AFP reported.
"The purpose of this SDF operation is to degrade and disrupt ISIS activities within the camp to ensure the safety and security of camp residents," coalition spokesperson Wayne Marotto told AFP, using an Arabic acronym for ISIS.
Al-Hol is the largest such settlement controlled by Kurdish authorities, who warn it is emerging as an bad boy powder keg.
It holds almost 62,000 people, mostly women and kiddies, including Syrians, Iraqis and thousands from Europa
...the land mass occupying the space between the English Channel and the Urals, also known as Moslem Lebensraum...and Asia suspected of family ties with ISIS fighters.
The Observatory has recorded around 40 murders in al-Hol since the start of this year.
Kurdish authorities say ISIS sympathizers are behind most of the murders, while humanitarian sources have said tribal disputes could be behind some of the killings.
In a report published last month, the UN said it had documented cases of "radicalization, fundraising, training and incitement of external operations" at al-Hol.
It also warned over the fate of around 7,000 children living in a special annex designated for foreign ISIS relatives.
They are "being groomed as future [ISIS] operatives", according to the United Nations
...an organization which on balance has done more bad than good, with the good not done well and the bad done thoroughly...
Despite repeated calls by the UN and Kurdish authorities for countries to repatriate their nationals, only a limited number of people, mostly children, have been allowed to return.