Attacker who killed U.S. troops in Syria was a recent recruit to security forces, official says

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A Syrian hired as a security guard killed two U.S. service members and one American civilian Saturday in an attack near Palmyra.

Syrian officials had grown suspicious the man might be affiliated with Islamic State and were monitoring him, but decided to continue surveillance rather than arrest him.

The incident tests the delicate U.S.-Syria partnership, as Washington deepens cooperation with Syrian forces post-Assad while critics question their reliability given Islamic State infiltration.

BEIRUT — A man who carried out an attack in Syria that killed three U.S. citizens had joined Syria’s internal security forces as a base security guard two months earlier and was recently reass