At least 40,000 Syrians have fled fighting near the northern city of Aleppo in recent days as regime forces continue an offensive against opposition despite a truce, the United Nations said.

Escalating violence has pushed people eastwards towards the strategically vital border town of Azaz, as well as the Bab al-Salam and Sijjou refugee camps, the UN Office for Humanitarian Affairs (OCHA) said on Wednesday.

"Taking into account the previous influx of over 75,000 internally displaced people into the Azaz sub-district in January and February, humanitarian needs are expected to rise exponentially," OCHA said in a statement.

The UN expressed deep worry on Wednesday over the fate of the thousands displaced by the fresh fighting.

"We are extremely concerned at the intensification of fighting in northern Syria and its impact on civilians, as well as humanitarian delivery to the area, and continue to monitor the situation closely," Ariane Rummery of the UN refugee agency said.
Border closed

Aid agencies have distributed food baskets and blankets, jerry cans, mattresses and plastic sheeting for thousands of newly displaced people and are preparing to scale up the response, she said.

The medical charity Doctors Without Borders (MSF) said that there were now more than 100,000 people trapped on the Syrian side of the Turkish border.

Turkey has closed the frontier to all but the most seriously ill or wounded people.

Fragile ceasefire

Fighting around Aleppo has become the biggest threat to the fragile cessation of hostilities that came into force on February 27.

It has also has contributed to the decision by the main opposition delegation to suspend its formal participation in peace talks.

The opposition accuses the regime of violating the cessation of hostilities agreement to launch a new offensive to capture Aleppo, Syria's most populous city before the war, which has been divided between regime-controlled and opposition-held zones for years.

PHOTO CAPTION

Aleppo, Syria. February 27 [Reuters]

Al-Jazeera