Beirut: US-backed Kurdish and Arab fighters advanced into the Islamic State jihadist group's bastion of Manbij in northern Syria, sparking fierce street fighting as they push to take the city.
Backed by air strikes by the US-led coalition bombing Islamic State in Syria and Iraq, fighters with the Syrian Democratic Forces (SDF) alliance entered Manbij from the south, a monitoring group said.
The advance marked a major breakthrough in the battle for Manbij, once a key link on the supply route between the Turkish border and Islamic State's de facto Syrian capital of Raqa.
The loss of the city would deal another blow to Islamic State following a string of recent battlefield defeats, including the taking by Iraqi forces earlier this month of the centre of the Iraqi city of Fallujah.
On the humanitarian front, the United Nations said it would begin flying desperately needed aid from Damascus to the northeastern city of Qamishli, which has been inaccessible by road for more than two years.
The Syrian Observatory for Human Rights, a Britain-based monitor, said SDF forces were able to break through Islamic State defences in Manbij a few hours after taking control of a village on the city's southwestern outskirts.
"Fierce street fighting between buildings" erupted as they entered the city, said Observatory chief Rami Abdel Rahman, whose group relies on a broad network of sources inside Syria to monitor the conflict.
An SDF commander at the front told AFP that Islamic State fighters were using car bombs and other explosives to try to slow the assault.
"Our forces, in coordination with the coalition, are determined to advance inside the city and eliminate all Daesh fighters," he said, using an Arabic acronym for Islamic State.
Abdel Rahman said tens of thousands of civilians were trapped inside the city, though some 8,000 had been able to flee since the start of the SDF offensive on Manbij on 31 May.
He said six civilians including a child were killed today by a mine as they tried to flee the city, which had a population of about 120,000 before the start of Syria's civil war in 2011.
The SDF managed to encircle the city on 10 June but its advance slowed as Islamic State fought back, including with almost daily suicide bombings.
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Updated Date: Jun 24, 2016 11:14:33 IST