Jamaica's Usain Bolt added the 200 metre crown to his Olympic 100 metre title in an incredible new world record time of 19.30 seconds in Beijing.

Bolt seized both with ease, becoming the first man to secure the prestigious Olympic sprint double since Carl Lewis in 1984.

The 21-year-old, who won the 100 metre title in a world record time of 9.69 seconds, powered past the field to cross the line and smash Michael Johnson's mark of 19.32 seconds which he set 12 years ago in Atlanta.

Bolt, who will celebrate his 22nd birthday in Beijing today, could win a third gold medal when he competes in the 4x100 metre relay.

The heats of 4x100 metre relay will start at 12:20am tomorrow.

Meanwhile, China who has not won the Olympic Games since it started in 1869, is on track to win their first ever Olympics in Beijing.

They lead the medal tally with 45 gold, 14 silver and 20 bronze.

USA who has won most of the Olympic Games is still in second place with 26 gold, 28 silver and 28 bronze while Great Britain is in third place with 16 gold, 10 silver and 11 bronze.