A government official said today that more than 300 people were still formally unaccounted for after the collapse of the garment factory complex on April 24 that killed 1,127 people.
Family of the dead and missing along with labour activists and students gathered to lay floral wreaths at the site.
Nasima Begum, 40, said she had searched tirelessly since the tragedy for her son who had been working on the third floor of the doomed building.
Authorities have stopped searching for bodies at the nine-storey Rana Plaza complex in Savar district since the tragedy that highlighted appalling safety conditions in the sector.
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Most of Bangladesh's top garment factories, which make clothing for a string of major Western retailers including Walmart, H&M, Tesco, Inditex and Carrefour, are based at Savar.
Authorities say at least 2,438 people -- mostly female garment workers -- were rescued from the site, including 968 people who were seriously injured.
Many of those are thought to be bodies recovered from the rubble, which were too badly damaged to identify. They were buried at a graveyard in Dhaka after DNA samples were collected for later identification, authorities have said.
"We have kept DNA profiles of unidentified bodies before burial. We will match those profiles with their relatives' to confirm identity and compensation beneficiaries," the official, Kamrul Hasan Molla, told AFP.
Begum said she had given her DNA sample to the authorities to match it against those collected from the bodies, but had heard nothing.
"This is no way an accident, this is murder of so many workers, which is unprecedented in our history," said Anik Biswash, a university student in Dhaka.
"We demand exemplary punishment to the culprits and the government upgrades factory safety standards to prevent such disasters in future.