The militants took the crossing on Sunday, but as of this evening, it was back in Iraqi government hands, a police colonel and a major in the border guards said.
The militants withdrew without fighting, the officers said, allowing security forces to move back in.
The two other official border posts between Iraq and Syria - Al-Qaim and Rabia - are still outside central government hands. Militants control the first while security forces from the country's autonomous Kurdish region hold the second.
Security forces wilted under the initial onslaught, and are now struggling to hold their ground in the face of the relentless militant drive.
