At least 23 survivors had been located in one air-pocket of the collapsed building, while two more groups were located close by, bringing the total to as many as 50, says our reporter.

BBC: Dhaka building collapse: 'Large group' found alive

The artisan puzzle-maker, who has been hand-cutting jigsaws since 1952, said the air turned blue when the puzzle collapsed to the floor of his Brewers Quay workshop in April.

BBC: Norfolk

And as she headed back toward her apartment, four blocks from what was soon to be known as ground zero, the south tower collapsed, sending a plume of debris into the air and straight down her street.

CNN: The story