Protestors in Bangladesh have demanded the execution of factory bosses over the death of nearly 400 people in a building collapse last Wednesday.

Despite calls by the prime minister for "cool heads", there's fears of violence at textile mills as tensions continue to grow over the country's deadliest industrial disaster.

Several thousand workers have marched for May Day holding red banners and flags chanting "Hang the killers, Hang the Factory Owners!".

While now the onus falls to th Bangladeshi government and governments worldwide to ensure that foreign companies operating in the developing world country adhere to best practices.

The garment industry there has exploded since the 1990s, and conditions have deteriorated for workers as cost pressures increase.

The Bangladesh government has introduced a minimum wage of 38 dollars per month, but that figure falls below the living wage.

Paul O'Brien is Overseas Director for Concern, he says the disaster has brought a fresh focus to poverty in Bangladesh: