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Last Updated: Thursday December 23 2010 15:11 GMT

Tigers at a zoo are trying to cross a frozen stream!

Tigers at Dartmoor zoo are trying to escape by crossing a frozen stream!

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Tigers at Dartmoor zoo are trying to escape by crossing a frozen stream!

It runs round the outside of their enclosure in Plymouth.

The cold weather has meant it's frozen over.

So zoo-keepers have been breaking the ice to make sure the tigers don't run off!

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