Central Command Strikes Syria's Islamist Groups
Ansar al-Islam is al-Qaeda-linked group in Syria.
U.S. operation followed killing ISIS financier in northern Syria.
Admiral Brad Cooper says U.S. target militants in Syria.
Strike details unspecified, no location or casualties given.
Hayat Tahrir al-Sham remains excluded from targeting.
Hurras al-Din and Ansar al-Islam face increased U.S. pressure.
4 weeks ago