DHAKA/CHICAGO (Reuters) – Three supervisors of a Bangladeshi garment factory were arrested on Wednesday as protests over a suspected arson fire that killed more than 100 people raged on into a third day, with textile workers and police clashing in the streets of a Dhaka suburb.

The government has blamed last weekend’s disaster, the country’s worst-ever industrial blaze, on saboteurs and police said they had arrested two people, who were seen on CCTV footage trying to set fire to stockpiles of material in another factory.

The fire at Tazreen Fashions has put a spotlight on global retailers that source clothes from Bangladesh, where wage costs are low – as little as $37 a month for some workers. Rights groups have called on Western firms to sign on to a safety program in that country, the world’s second-biggest clothes exporter.

Wal-Mart Stores Inc, the world’s largest retailer, said one of its suppliers subcontracted work to the now burned-out factory without authorization and would no longer be used. But one of the most senior figures in the country’s garment industry cast doubt on that claim.

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