The attack took place near a place containing oil and gas fields known as Conoco, where US troops are deployed.
“I can confirm that there was an indirect fire attack in Conoco (Syria). At this time, the first reports are no casualties, injuries (or) structural damage,” the official said.
This is one of several places in eastern Syria where US troops are working to help local partner forces fight ISIS. There are a total of about 900 US troops in Syria.