Bolt plans 400m assault

Nairobi - Olympic and world sprint champion Usain Bolt plans to move up to the 400 metres after setting world records in the 100m and 200m.

Bolt told a news conference on Friday his main goal was to become a legend in his sport after shattering the 100m and 200m world records at last year's Beijing Olympics and again at this year's Berlin world championships.

"Next year is the same thing, win the championships, break more records and eventually move up to the 400m," he said.

The 23-year-old Jamaican, who also confirmed he was interested in attempting the long jump, has previously hinted that he might attempt the 400m at the 2012 London Olympics.