The crossing is a 240 km drive from Palmyra, also known as Tadmur, which has been under ISIS control since the middle of last year.

A border crossing with Iraq was seized by Syrian rebel fighters from ISIS militants on Friday.

According to the Britain-based war monitor, the Syrian Observatory for Human Rights, the al-Tanf border crossing has been controlled by ISIS since May last year.

Prior to that, it had been under the control of Syrian government forces and had been the last border crossing with Iraq that was under their control, according to Reuters news agency,

ISIS, which controls a swathe of territory spreading from Iraq into central Syria, still controls the Bukamal Syria-Iraq border crossing near Deir al Zour.

The Observatory said the rebel fighters who took the crossing crossed into Syria from Jordan.

The crossing is a 240 km drive from Palmyra, also known as Tadmur, which has been under ISIS control since the middle of last year.

Related articles across the web

• U.S.-led strikes in Syria kill 38 civilians in past two days - monitor | Reuters
• Islamic State attack shuts Syrian government supply route for second day
• Kerry: U.S. Considering 'Plan B' In Syria If No Peace
• ISIS attack shuts Syrian govt supply route for 2nd day
• Russia calls ISIS attacks in Syria 'abhorrent,' calls for international reaction
• 'At least 62' killed in blasts in Syrian capital
• Israeli rockets hit Syrian army outposts near Damascus
• Syrian blasts kill more than 100, as Kerry says progress toward cease-fire
• [Ticker] Slovakia ready to put up border barriers
• US Steps up Bombing in Northeastern Syria