Three 107 mm rockets targeted the base on Sunday and a fourth rocket along with rocket tubes was found at the launch point, about 5 kilometers away, the command said in a statement.

The Green Village base was targeted last month in violence between the US military and Iran-backed militants leaving at least one US military service member in Syria with a minor injury.

The incident triggered a US response that killed two or three militants conducting the attacks.

According to Reuters, the Central Command said it was investigating the latest failed attack, which struck at approximately 7:05 p.m local time in Syria.

It gave no further details.

US forces first deployed in Syria during the Obama administration's campaign against ISIS, partnering with the Syrian Democratic Forces, a Kurdish-led group. There are about 900 US troops in Syria, most of them in the east.