This picture shows the Zasyadko mine in Donetsk after a blast occured on March 4, 2015. (Agence France-Presse)
Thirty-two miners in eastern Ukraine were missing and feared dead on Wednesday following an explosion at a coal mine in the rebel-held city of Donetsk.
The blast took place at Zasyadko mine in the separatist hub of Donetsk, near the city's war-wrecked airport.
The chairman of Ukraine's parliament, Volodymyr Groysman, announced 32 miners killed in what he called a "terrible tragedy".
"There are victims, currently numbering 32," Groysman told the assembly, calling on lawmakers to observe a minute's silence.
Mykola Volynko, head of the Miners' Union of Donbass, which covers the eastern region, confirmed that figure. "At the moment we know of 32 people dead. We don't know how many people are still in the mine," he told AFP.
But Grosyman later cast doubt on the fate of the miners, telling MPs that, "according to the latest information", 32 miners were unaccounted for, but that only one was confirmed killed.
A spokesman for the Trade Union of Coal Miners in Ukraine told AFP that two bodies had been brought to the surface so far.
Rescue workers were trying to locate a further approximately 45 miners, said the spokesman who did not wish to be named, adding the chances of finding them alive were "practically zero".
A spokeswoman for the ministry of emergency situations of the self-proclaimed Donetsk People's Republic told AFP there were still scores of people trapped in the shaft.
"At the moment there are still 70 people underground but the situation is constantly changing as we bring people to the surface," spokeswoman Julia Bedilo said, blaming the blast on trapped methane gas.
Rebels blocking access?
Donetsk has been the focus of a nearly year-long conflict between government forces and pro-Russian rebels.
The accident comes nearly three weeks into a ceasefire deal. Rebels overran the town of Debaltseve in the wake of the ceasefire, but the truce since then has largely held.
Ukrainian Prime Minister Arseniy Yatsenyuk said he had ordered his energy and emergencies ministries to scramble rescue teams to the scene. But the rebels "did not allow Ukrainian rescue teams to reach the site and help save people's lives," he told a cabinet meeting.
President Petro Poroshenko sent his condolences to the families of the perished miners and demanded that the rebels give Kiev-loyal authorities access to the site.
"I demand that Ukrainian rescuers and policemen are granted access to the scene of the tragedy," he wrote on Twitter.
Anxious family members waited outside the mine for news of their loved ones.
Valentina Dzuba, 72, told AFP she had been waiting for seven hours for news of her son Vladimir, aged 47. "I heard the news on the TV," she said in tears. "We have no information. I fear he's dead."
Ukraine's coal mines are considered among the world's most dangerous, with many of them poorly financed and employing outdated Soviet-era equipment.
Most of the country's mine disasters are caused by build-ups of methane gas.
Zasyadko mine, which is one of the country's biggest, was the scene of the worst mining accident in the country's post-Soviet history in 2007, in which 101 people were killed.
The mine, which is owned by Yukhym Zvyahilsky, a member of the national parliament, lies on the outskirts of Donetsk, just a few kilometres from the frontline.
The facility has been caught in crossfire between the rebels and government forces on several occasions. On one occasion, miners were trapped inside after shelling knocked out its power supply.
The accident comes as the warring parties claim to be pulling back their artillery in line with the February truce.
Ukraine's army said on Wednesday it was pulling back 152-calibre howitzers, the "second stage" in the accord.
Meanwhile, near Mariupol, the biggest city in the conflict zone still controlled by Kiev, local security officials accused rebels of shelling Ukrainian positions in the village of Shyrokine. "The situation continues to be tense," a statement by the local security headquarters said.
One Ukrainian soldier was also reported dead in sporadic fire from the rebels, security spokesman Andriy Lysenko said.