Stockholm - Thieves used a helicopter and explosives early Wednesday to rob a cash depot in Stockholm, in what appeared to be a well-planned and expertly executed heist, according to police and witnesses. Police launched a major hunt for the robbers who were found to have abandoned the helicopter, which is believed to have been stolen from an aviation school, in a field north of Stockholm.
The robbers - two or three men - lowered themselves from the helicopter onto the roof of the building used by security services company G4S at around 5 am (0300 GMT).
Minutes later, several explosions were heard and witnesses saw what appeared to be money bags being hoisted into the helicopter.
There was no immediate estimate of how much money the robbers got away with.
Police helicopters at the Stockholm police helicopter base were unable to take up pursuit since a suspected bomb was placed outside the hangar entrance, police said.
Sharp spikes were also spread near the depot, preventing police vehicles from approaching it.
At least 10 GS4 employees were reported to have been in the building when the robbery took place. They were being interviewed by investigators.