The Syrian army has broken the siege imposed by Islamic State militants on Deir al-Zour for more than three years, according to the Syrian news agency SANA.
According to the correspondent of (SANA), in the city that the army units deployed on the hill, Sanof "opened a gap" in the areas between them and areas of deployment of the militants of the organization.
The military information unit of Hezbollah, an ally of the Syrian regime, said troops and its militia had reached the base of Brigade 137 on the western outskirts of the city.
Syrian President Bashar al-Assad congratulated the army on "breaking" the siege on the city, which has been surrounded by the organization since 2015.
"You have proved steadfast in the face of the most powerful terrorist organizations on the face of the earth," he said in a telephone conversation with army commanders. "Pure blood has produced a resounding victory over terrorist-backed Terrorism ideology, regionally and internationally."
For its part, the Syrian Observatory for Human Rights (British-based) said that a number of areas under the control of the government, including three neighborhoods in the city as well as a war airport southeast of the city, is still besieged by the militants of the organization.
About 93,000 civilians live in the city and rely on supplies and aid from the United Nations.
The United Nations earlier warned that the situation in the city has become "very difficult".
Deir al-Zour is the last major stronghold of the Islamic State in Syria, while the city of al-Raqqa, described by the organization as the capital of the caliphate, is surrounded by the US-backed coalition of Syrian forces.
The Syrian news agency reported that the warplane destroyed a convoy of 10 vehicles of the organization while fleeing from the south-west of the city of Deir al-Zour in the direction of the city of Al-Mayadim in the east.
She pointed out that violent clashes took place with the militants who surrounded the base of Brigade 137 before the gunmen fled from their positions, leaving behind their weapons, in addition to the clashes that took place as troops advanced west of the city.
The correspondent of the agency said the residents of Deir al-Zour took to the streets of the city to celebrate "the end of the siege."
In neighboring Iraq, the army said its forces had expelled state fighters outside the cities of Mosul and Tal Afar, meaning that the organization was no longer in control of the town of Hawija, some 300 km north of Baghdad, and some desert areas on the border with Syria.