Fighting between U.S. troops and militias draws scrutiny to Syria role

Clashes between U.S. troops and Iran-backed militias in Syria this month have prompted new scrutiny of the Pentagon’s mission in Syria, as tit-for-tat strikes threaten to escalate tensions in the region.

The U.S. decision to target facilities in eastern Syria on Tuesday — which officials say had been used to launch attacks against U.S. forces by groups affiliated with Iran’s Islamic Revolutionary Guard Corps — threatens to heighten tensions with Iran as the two countries try to reach a deal to revive the 2015 nuclear deal.