It was in mid-August that an explosive charge was found in a bag in Kungsträdgården, outside the Opera Källaren.

It was a Sunday evening and the area was full of people because of the Stockholm Culture Festival.

Three fifteen-year-olds were later arrested on suspicion of having placed the bag, one of them is now in custody.

The three boys are all natives of Jordbro and according to information to Dagens Nyheter, the three must have taken the commuter train from their hometown into Stockholm city.

During the trip, they are said to have been caught on SL's surveillance cameras.

- It is a collaboration that we found it, we recognized those guys, says Niklas Alnered, who since 2018 has worked as an area police officer in Jordbro, to Dagens Nyheter.

The two youths who were not detained say they had nothing to do with the whole thing, and that they believe the detained boy must have been coerced, according to the paper.

Javascript is disabled

Javascript must be enabled to play video

Read more about browser support

Hear when bomb technicians blow up the bag in Kungsträdgården.

Photo: Blue light images