Fans went wild in Jamaica and London after Usain Bolt's new Olympic record.

He retained his Olympic 100 metres title when the Jamaican bolted down the track in 9.63 seconds.

(SOUNDBITE) (English) LONDON RESIDENT, DANNY RAS, SAYING:

"He represents the power that we hold, and it seems to be hidden a lot of the time. We've got a power; we've got an inner strength that can't be taken sometimes. World records, consistent winning the race, it's something that just can't be taken. So we're working with that, it's our strength, we have to back it and support him with it."

For Jamaica the timing was perfect as the Caribbean nation celebrates 50 years of independence from Britain.

(SOUNDBITE) (English) FAN OUTSIDE OF BAR SAYING:

"Elated for him, so that's the reason I came to his (Usain Bolt's bar) place, to celebrate the moment, a wonderful moment for Jamaica fiftieth."

Bolt will now bid to win an unprecedented double-double by retaining his 200 metres title and will also seek a sixth sprint gold in the 4x100 metres relay.

Sophia Soo, Reuters.