"During a body check that followed, a rapid test turned up explosives," the statement said.
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The statement did not provide any detail on the explosives.
Police vehicles are parked in front of the Swiss Parliament after a man wearing a bulletproof vest was found near the entrance of the building with explosives. (Manuel Lopez/Keystone via AP)
The suspect, who was not identified, was undergoing physical and mental exams, the statement said. Federal prosecutors and police opened a criminal investigation. There was no immediate indication about a possible motive.
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Police cordoned off Federal Square outside the ornate parliament building and nearby streets for several hours as they dispatched security teams — including fire squads and de-mining experts, backed by a police dog and drones — to inspect an abandoned car that had been associated with the suspect.
Security measures were lifted after it turned out that the vehicle presented no danger, the police statement said.
Switzerland has rarely had any run-ins with extremist violence, but the federal police has regularly warned of the threat.