On Friday afternoon the residents of Rolfsgatan, a cobbled street of desirable former workers' cottages in the Swedish city of Malmö, held a street party. There was a barbecue, with hotdogs and toasted marshmallows.

But it wasn't to mark some sort of jubilee. It was because of the explosion.

At two o'clock on the previous Friday morning, the street was jolted awake by a giant blast which blew a chunk out of the wall of the nearest house and shattered the front and back windows of five others down the street.

"We woke up suddenly because of the bang. The blinds shot up because of the pressure," said Daniel Petersson Georén, 40, who was sleeping upstairs in the next-door house with his wife and their four, six, and eight-year-old children.

While he comforted the two children who had woken, his wife Sofia ran downstairs to find their garden door blown clean off and their Volvo parked outside written-off.