FBI searches for Uzbek migrants smuggled into US by ISIS-linked network

Uzbek nationals sought asylum after entering US from Mexico with help of smuggler tied to ISIS.
Migrants screened by DHS, released pending court dates before FBI uncovered smuggling network.
Officials concerned but have not identified specific terrorist plots associated with individuals.
FBI working to identify all migrants brought in, subjecting them to extra vetting and expedited removal.
US government collaborated with foreign partners to disrupt smuggling network.