ROME -- Jamming devices to halt communication were installed at the Vatican on Monday, as part of a security lockdown ahead of the papal conclave.
The behind-the-scenes ballot process is supposed to remain a secret, but modern technology left Roman Catholic Church officials taking no chances.
Staff working alongside the cardinals voting inside the Sistine Chapel must swear an oath of secrecy.
"I expect they'll be on a total lockdown," NBC News' Vatican analyst George Weigel said. "Security is tight. It's got to be."
Jamming devices will be used at the Sistine Chapel inside the Vatican and the nearby guest residences at Santa Marta where cardinals will sleep during the conclave, officials told reporters on Friday.
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