Fighting raged in Aleppo yesterday as rebels doggedly resisted a regime onslaught launched in the northern Syrian city a month ago.

Civil war is the cruellest kind of conflict, when a neighbour kills his neighbour and sometimes his brother, it is the worst of conflicts

As the killing went on, new peace envoy Lakhdar Brahimi warned it is now a matter of ending not avoiding civil war.

Clashes also erupted in part of the capital Damascus as a watchdog reported at least 84 people killed across Syria on the first day of the Muslim Eid al-Fitr holiday on Sunday and the UN wound up its troubled observer mission to the country.

The Syrian Observatory for Human Rights also reported at least 101 people were killed in a fresh spate of attacks across the nation yesterday.

Aleppo, the main northern city which lies near the Turkish border, has borne the brunt of the conflict since fighting erupted there on July 20, after the regime warned it would be the scene of the “mother of all battles”.

The British-based Observatory said troops backed by helicopters pounded several Aleppo sectors yesterday, including parts of the Salaheddin neighbourhood where much of the regime’s military operations against the rebels have been focused.

Despite claiming to have overrun Salaheddin on August 8, the rebels still control pockets of the southwestern neighbourhood according to activists on the ground.

Parts of Damascus too were rocked by clashes yesterday, with the Observatory reporting fighting in several southern neighbourhoods, where loud explosions were heard.

Meanwhile, an unknown number of people were reported killed and wounded in the southern town of Herak, which the main opposition umbrella group, the Syrian National Council, said had been pounded relentlessly for almost three months causing a “humanitarian catastrophe”.

Besides the fighting, Syrians have had to face food shortages, the closure of many shops and street demonstrations at Eid, the festival celebrated by Muslims across the world to mark the end of the holy month of Ramadan.

President Bashar al-Assad made a rare public appearance with top officials for Eid prayers at a Damascus mosque on Sunday while demonstrators took to the streets of the capital and other cities to vent their rage at his regime.

“Eid is here, Eid is here, God curse you, O Bashar,” protesters in Qudsaya in Damascus province sang to the tune of Jingle Bells on amateur videos posted on YouTube.

UN observers wound up their troubled mission at midnight on Sunday in the face of the escalating violence and a failure by world powers to agree on how to tackle Mr Assad and bring about peace to the strategically vital Middle East state.

The end of the mission came just days after new international envoy Mr Brahimi was named to replace Mr Annan.

“A civil war, it is the cruellest kind of conflict, when a neighbour kills his neighbour and sometimes his brother, it is the worst of conflicts,” Mr Brahimi said in an interview with France 24 television in Paris.

“There are a lot of people who say that we must avoid civil war in Syria, I believe that we are already there for some time now.

“What’s necessary is to stop the civil war and that is not going to be easy.”

Mr Assad, from the minority Alawite community of an offshoot of Shiite Islam, has characterised the conflict as a battle against a foreign terrorist plot aided by the West and its allies in the region, led by Sunni powerhouse Saudi Arabia.

Jordan, meanwhile, said four rockets fired from neighbouring Syria fell inside its northern border area, wounding a four-year-old girl and sparking a letter of protest.

“We are in touch with the Syrian sides to determine what happened,” Information Minister and government spokesman Samih Maaytah said.

“The Jordanian government summoned the Syrian ambassador in Amman and gave him a letter of protest. Jordan rejects what happened and will make sure it does not occur in the future.”

Jordan currently hosts more than 150,000 Syrian refugees. Many of them come under Syrian army fire as they flee to the kingdom, whose troops provide covering fire.

Turkish authorities on Sunday crossed the Syrian border to distribute food and other supplies to hundreds of Syrians who have been forced from their homes and are massed at the border, emergency officials in the region said.