The intruder managed to get past the first gate with a stolen set of keys, which could also open a restaurant, conference rooms and an internal lock to the drawbridges.

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At another, the band set up a drum machine and weighed down the keys of a synthesizer before leaving the stage.

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It showed her dropping off a set of keys at the home of the children's father, Craig McLelland, in Belvedere Road, Lowestoft, at about 06:20 BST on Monday.

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In addition, a set of keys dropped at the scene were traced to an apartment in a Queens public-housing project where Mr. Thomas appears to live, the official said.

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For instance, requiring encryption software and hardware makers to hold a decoding key in "key escrow" is the equivalent of asking a bank to hold an extra set of safe-deposit-box keys.

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