Olympus cameras on display
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Olympus struggles to contain crisis over $687m payment

25 October 2011 Last updated at 01:44 BST

Shares in the Japanese camera maker Olympus have lost more than half of their value in just over a week, as it struggles to contain a growing financial scandal.

There are reports that the FBI is now investigating a payment of $685m that the firm made in relation to the purchase of a British company in 2008.

The BBC's Roland Buerk explains why the firm has been engulfed by crisis in such a short period of time.