It followed the world record breaking exploits of his team-mate Clarence Cummings Jr yesterday in the under-69kg division

Maurus lifted 140kg in the opening snatch event to place second behind Russian Aleksandr Urvachev, who managed 142kg.

But the American proved a class apart in the decisive clean and jerk.

He produced three successful lifts culminating in a majestic 192kg with his final effort.

This added a single kilogram to the youth world record previously held by Yeison Lopez of Colombia.

Urvachev proved unable to come close, but still took silver with a combined total of 312kg.

Asslyzhan Bektay of Kazakhstan clinched bronze with 306kg.

Fang Lin of China proved far strong for the rest of the field in the women's under-63kg event.

She managed a 93kg snatch followed by a 117kg clean and jerk for a total of 210kg.

Darya Pavlova of Kazakhstan lifted a combined 201kg to finish second.

China also took bronze courtesy of Jiang Yunliu, who lifted 199kg.

Action is set to continue tomorrow in Bangkok.