Afrasianet - The US-backed "Syrian Democratic Forces" penetrated the fence surrounding the old town of al-Raqqa in an attempt to restore the city of northern Syria from the hands of the Islamic state, the US military command said Monday night.

"The coalition forces supported the progress of Syria's democratic forces in the most fortified part of Al-Raqqa by opening two small holes in the Rafiah wall that surrounds the Old City," the US command said in a statement.

The Syrian Democratic Forces entered for the first time on Sunday the city of Raqqa, stronghold of the Islamic State Organization, from the south after crossing the Euphrates River, according to the Syrian Observatory for Human Rights.

Coalition forces "launched targeted raids on two small sections of the fence, allowing the coalition forces and their partners to penetrate the Old City in places chosen by it," the statement said. "The Islamic state was banned from using mines and explosive devices, protecting the Syrian forces and civilian lives. "He said.

The fence, which was targeted by the raids, "is 25 meters long and will contribute to the preservation of the remaining part of the fence, which is 2500 meters long," the statement said.

In recent months, Syria's democratic forces have tightened their grip on the jihadist stronghold in northern Syria and entered the east and west of the city for the first time last month.

On Thursday, forces comprising Kurdish and Arab factions cut off the last remaining port of the Islamic state from the south of the city of Raqqa, besieging the jihadis in full.

Some 2,500 fighters of the Islamic State Organization defend Al-Raqqa, according to the International Alliance.

The organization of the Islamic state took control of al-Rigga in 2014 and around it "the capital of the Caliphate" announced three years ago.