Syrian government forces have renewed shelling on the last holdouts of rebel-held eastern Aleppo, according to opposition activists and local journalists, raising fears that a deal to evacuate civilians and rebels from the devastated city may not be honoured.

"There is artillery [being fired] now ... as I speak," Zouhir Al Shimale, a journalist in east Aleppo, told Al Jazeera in a WhatsApp message on Wednesday morning.

"There aren't any clashes," he said, explaining that rebel groups were not fighting at the moment. "There are injuries, but we don't know how many. We can't go outside because the shelling is indiscriminate."

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The UK-based Syrian Observatory for Human Rights also said shelling could be heard, but its origin was not clear. Speaking to the Reuters news agency, rebel commanders said government forces had renewed shelling and violated a ceasefire reached a day earlier.

The Russian defence ministry confirmed that government forces had resumed attacks, claiming that rebel groups broke the ceasefire in the early morning, according to Russia's Interfax news agency.

Aleppo, once Syria's bustling commercial hub, had been largely divided between a government-held west and a rebel-controlled east since 2012. But government forces are now in control of almost the entire city after weeks of intense fighting and relentless air raids.

WATCH: Aleppo rebels reach ceasefire deal with Russia (2:54)


On Tuesday night, it was announced that a ceasefire between the Syrian government and rebel groups would allow for the evacuation of tens of thousands of residents from the last pockets of rebel-held eastern Aleppo to the Idlib area or to Turkey.

The deal was brokered by Turkey and Russia.

The arrangement was delayed on Wednesday morning, though, with rebel groups claiming that a government-aligned Shia militia had turned back evacuees and demanded that rebel-imposed sieges of the Shia majority towns of Kafraya and Al-Fua were first lifted.

'Massacred in cold blood'


"People here are shocked [by the delay]," Shimale said. "We didn't sleep last night, waiting to leave."

Explaining that civilians were scared that the evacuation could be delayed further, Shimale said: "No one knows what the regime will do."

Russian Foreign Minister Sergei Lavrov said he expected the last of the "rebel resistance" to end within two to three days.

In what appeared to be a separate development from the planned evacuation, the Russian defence ministry said 6,000 civilians and 366 fighters had left rebel-held districts of Aleppo over the past 24 hours.

Buses evacuating people from rebel-held eastern Aleppo were allegedly turned around by Shia militias [Omar Sanadiki/Reuters]


Fears have been growing for thousands of trapped civilians as rebels make a desperate last stand in their remaining pocket of territory.

Late on Tuesday, Turkey's Deputy Prime Minister Mehmet Simsek announced his government was planning to set up a new tent city to host "80,000 people fleeing eastern Aleppo". He did not specify whether the facility would be in Turkey or Syria.

The UN said on Tuesday that they received reports about pro-government forces executing scores of civilians in Aleppo, including women and children.

Eighty-two people were reportedly killed when Syrian forces took over rebel-held areas, it said.

Forces loyal to President Bashar al-Assad have in some cases entered homes and killed those inside, and in others "caught and killed on the spot" fleeing civilians, Rupert Colville, the UN rights office spokesman, said on Tuesday.

"The reports that civilians - including children - are being massacred in cold blood in their homes by Syrian government forces are deeply shocking but not unexpected given their conduct to date," Lynn Maalouf, deputy director for research at Amnesty International's Beirut regional office, said. "Such extrajudicial executions would amount to war crimes."

'Surrender, not a ceasefire'


Describing the ceasefire as "a surrender, not a ceasefire", Haid Haid, a Syrian researcher and associate fellow at Chatham House, said the government could renege on the deal if the international community does not apply pressure on it.

"Negotiations have been ongoing for days now, and now the regime is sure that [it] is winning," he told Al Jazeera.

"So unless there is serious pressure from the international community on Russia on the regime, I think this deal might not even happen because they think they're winning ... why allow [the rebels] out if we can kill the rest of them there and now."

Syria's conflict started as a largely unarmed uprising against Assad in March 2011. It has since morphed into a full-scale civil war that has killed hundreds of thousands and left more than half the country's prewar population displaced.

Efforts to negotiate a lasting resolution between the Syrian government and rebel groups have collapsed several times.

Source: Al Jazeera and news agencies