Brazilian authorities say up to 300 people are still missing after iron ore waste from a mine that flooded the mine complex and nearby neighborhoods in the southeastern city of Brumadinho. "My thoughts are with the victims and the missing people and their families".
It said Samarco has not yet reached an agreement with its lenders on the restructuring of its unsecured financial obligations.
The search is set to resume on Sunday morning.
The collapsed dam at Vale SA's Corrego do Feijao mine buried mining facilities and nearby homes in the town of Brumadinho, killing dozens and leaving the community in shock.
Rescue workers walk on a rail bridge that was destroyed.
At the scene of the disaster, helicopters looking for bodies took off and landed nonstop.
'Unfortunately, at this point, the chances of finding survivors are minimal.
Romeu Zema, the governor of Minas Gerais state, said that by now most recovery efforts will entail pulling out bodies.
According to Mr Schvartsman, these the dams are already inactive, but are surrounded but current mining operations, as was also the case in Brumadinho.
The company says the dam on the outskirts of Brumadinho had surpassed safety standards when it was inspected in June and September of a year ago.
Josiele Rosa Silva Tomas, president of Brumadinho residents association, said: "I've never seen anything like it. I want news, even if it's bad".
Vale SA is the world's largest producer of iron ore, the raw ingredient for making steel.
Brazilian courts have frozen 11 billion reals (about 2.9 billion USA dollars) in Vale's assets to ensure funds are available to indemnify victims while the company's legal team has been alleging the company bears no responsibility for the dam's rupture. Environmental agency Ibama fined Vale 250 million reais for regulatory violations, while state environmental agency Semad fined the miner 99 million reais.
The search for bodies was ongoing Tuesday, with a team of Israeli soldiers joining Brazilian crews who have been laboriously probing for days the expanse of mud released by the dam.
It's not believable that "dams of such magnitude, run by one of the largest mining companies in the world, would break suddenly without any indication of vulnerability", the judge wrote in the decision, according to news portal UOL. "I heard the cries of people asking for help, everyone was running and screaming".
"With bags on their backs, everything they could grab, children, old people climbing up, it was total despair", one man told the BBC.
The Brazilian prosecutor running talks to settle a lawsuit over the Samarco collapse told Reuters on Saturday the second dam burst could scramble those sensitive negotiations. "There have been warnings about all mining dams for a long time now".
In ordering the arrests, Minas Gerais judge Perla Saliba Brito wrote that the disaster could have been avoided. In all, 24,000 people have been affected by the disaster, he said.
Vivek Dhar, commodity strategist with Commonwealth Bank, said Vale's Feijao mine produced about 7.8 million tonnes of iron ore in 2017, after being decommissioned from 2014 to 2016. The case is now suspended amid negotiations for a potential settlement.
A worker outside the cafeteria who narrowly escaped the fast-moving mud flow told Reuters he doubted anyone inside had made it out alive.
The disaster was the first big emergency faced by Bolsonaro and his government since he took office in early January, and it may be one of the deadliest disasters in Brazil's history. "Due to the inquiries under way, we are not now in a position to provide more information".