The United States and other key members of the global coalition to defeat Islamic State are voicing renewed concerns about the terror group against the backdrop of a massive campaign to root out operatives trying to turn a once-liberated area into a new stronghold.

Foreign ministers with the so-called Global Coalition to Defeat ISIS Small Group met virtually Tuesday, more than two years after the collapse of the terror group's self-declared caliphate in Iraq and Syria, to focus on what they describe as increased activity in areas once controlled by the group's fighters.