Robbers use chopper to raid Sweden cash depot

The daring pre-dawn heist stunned police in the Swedish capital, who were unable to deploy their own helicopters to the scene because suspected explosives had been placed at their hangar.

The security company that owns the facility, G4S PLC, said the thieves had made off with "an unconfirmed sum of money" and added it would offer a large reward for information leading to their arrest and the return of the loot. The company did not give an exact amount for the reward.

One person was detained later Wednesday in a Stockholm suburb in connection with the robbery, but wasn't officially declared a suspect, police spokesman Christian Agdur told reporters.

Shortly after 5 a.m., the helicopter swooped down toward the cash depot and hovered over the building as the robbers hoisted themselves onto the roof in what police said was a carefully planned operation.

(...) There were 21 staff members inside the building during the heist, but no one was injured, police said.

Investigators said the robbers wore masks and were believed to have carried automatic weapons and used explosives during the 20-minute raid. Witnesses reported hearing loud bangs during the heist.