Shares in Toshiba have had their biggest one-day drop in 40 years.

They have concerns about write-downs on the company's US nuclear business.

At one point the share price was down 26% despite reports of meetings with the Development Bank of Japan,

that can lead to an injection of government funds,

unless estimate of the total write-down could be between 5 and 8 billion dollars.

A South Korean court has rejected an arrest warrant request for Samsung groups heir apparent and de facto head, Lee Jae-yong.

Special prosecutors have accused Samsung of funnelling more than 35 million dollars,

to foundations controlled by an 8th president in return for support of a merger.

The judge said: "There was not enough evidence to prove the allegations."

And Senegalese troops have entered Gambia,

as West African leaders implement their pledge to intervene if President Yahya Jammeh refuse to step down.

Mr. Jammeh lost in the election in December, but has rejected the result.

His term expired at midnight on Wednesday.

The president-elect Adama Barrow who fled Senegal in fear of his safety, is due to be sworn in on Thursday.

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