SOMA, Turkey (AP) — Rescue teams recovered eight more victims of Turkey’s worst mining accident on Thursday, raising the death toll to 282 in a disaster which has thrown Prime Minister Recep Tayyip Erdogan’s presidential ambitions off stride.

Although 363 miners were rescued, another 150 have not been accounted for. No miner has been brought out alive since early Wednesday.

Erdogan, who was expected to soon announce his candidacy for presidential elections in August, was forced to take refuge at a supermarket during his visit to the area Wednesday after angry crowds called him a murderer and thief and clashed with police.

Erdogan had earlier downplayed the disaster, calling mining accidents “ordinary things” that also occur in many other countries, after giving examples of 19th-century mine accidents in Britain.

Erdogan has made no secret of his desire to become Turkey’s first popularly elected president. His party swept local elections in March despite a corruption scandal that forced him to dismiss four government ministers in December and later also implicated him and family members. Erdogan denies corruption, calling the allegations part of a plot to bring his government down.

Protests broke out in Istanbul, Ankara and other cities over the deaths and poor safety conditions at mines around the country and Turk-Is, Turkey’s largest trade union confederation, representing some 800,000 workers, joined a one-day strike by other unions to demand better conditions for workers.

Even as hopes for the miners underground faded, Energy Minister Taner Yildiz told reporters that rescue efforts were focusing on two areas inside the mine.

Rescue operations at the mine have been suspended several times as burning coal inside created toxic fumes and too risky conditions for the rescue teams.

“We believe that we still have brothers in two areas that we still have not been able to reach,” Yildiz said. He did not say whether authorities believed they were dead.

The government has said 787 people were inside the coal mine at the time of Tuesday’s explosion. Scores of those rescued suffered injuries.

The death toll topped a 1992 gas explosion that killed 263 workers near Turkey’s Black Sea port of Zonguldak.

Authorities said the disaster followed an explosion and fire at a power distribution unit and most deaths were caused by carbon monoxide poisoning. Erdogan promised the tragedy would be investigated to its “smallest detail” and that “no negligence will be ignored.”

Mining accidents are common in Turkey, which is plagued by poor safety conditions. Tuesday’s explosion tore through the mine as workers were preparing for a shift change, which likely raised the casualty toll.

Turkey’s Labor and Social Security Ministry said the mine had been inspected five times since 2012, most recently in March, when no safety violations were detected. But the country’s main opposition party said Erdogan’s ruling party had recently voted down a proposal to hold a parliamentary inquiry into a series of small-scale accidents at the mines around Soma.

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Suzan Fraser reported from Ankara.