Nikkei falls sharply after shares tumble in NY

Shares in Tokyo plunged on Wednesday morning, following a broad sell-off in New York overnight.

The Nikkei 225 fell more than 800 points from Tuesday's close at one stage.

On Wall Street on Tuesday, all three major indexes slid nearly 2 percent or more amid a sharp rise in US Treasury yields and concerns over the economy if the debt ceiling is not raised or suspended.