IS fighters and their families captured in Syria are a latent threat and called on their home countries to deal with them.

"In my view this is a serious generational problem that if not handled properly will sow the seeds of future violent extremism," he said.

Votel spelled out his warnings nearly three months after President Donald Trump unexpectedly announced a full pullout of US forces from Syria, declaring a victory over IS.

Under pressure from Congress and the Pentagon, Trump has since moderated his preference to a drawdown of forces though insisting last month that the plan was to ultimately to leave a bare-bones force of only 200 "peace-keeping" troops in Syria.

"I am not reversing course," Trump said at the White House on February 22, noting that 200 soldiers wasDescription

KIEV, UKRAINE — A French nationalist detained in Ukraine with a huge arms cache planned a series of terrorist attacks at the Euro 2016 soccer championship, according to Ukrainian security services.

Suspect Gregoire Moutaux, a 25-year-old farmer from the French region of Lorraine, was arrested in a sting operation by Ukrainian security services when he attempted to cross into Poland on May 21, the BBC reported.

Ukraine’s SBU security service said Moutaux travelled to the war-torn east of the country to buy arms before his arrest in the town of Yahodyn near the Polish border, according to the BBC.

Moutaux allegedly bought an arsenal of weapons, which included five AK-47 rifles with 5,000 bullets, 125 kilos of TNT and 100 detonators, plus two RPG-7 anti-tank grenade launchers with 18 rounds. He