The al-Qaida-breakaway Islamic State of Iraq and the Levant has prevented food and medical supplies from reaching some neighborhoods in an eastern Syrian city and has ceased some of its operations in Syria while waiting for weapons to arrive from neighboring Iraq, activists said Friday.

Abdurrahman said Islamic State fighters have not fought major battles for the past two days except for some skirmishes in the northern province of Aleppo. He added that some Humvees apparently seized in Iraq have already appeared in the northern Syrian town of Manbij, which is under the control of the Islamic State.

The group, which is largely composed of foreign jihadists, has made significant headway in Syria over the past six weeks, seizing towns and villages in heavy fighting against the al-Qaida-affiliated Nusra Front and other Islamic rebel groups.

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