A REVENGE-motivated petrol-bombing may easily have ended in multiple deaths, a District Court judge said yesterday. Two would-be arsonists threw a Molotov cocktail into a populated area but it failed to ignite. 'Had it ignited properly, the consequences would have been extremely grave,' Judge Britton said. Yu Fung-hi, 30, and Wong Ki-leung, 27, were both found guilty of attempted arson and being members of a triad society. Yu was also convicted of possessing an offensive weapon. Both men were sentenced to six years in prison. Yu, who had been drinking, got into an argument in a Tsim Sha Tsui bar last October with Lam Man-choi that escalated into a shoving match, the court heard. Later, Mr Lam's group saw Yu, on a motorcycle with Wong, hurl the petrol bomb at the building. It fell to the ground beside a taxi. Bernard Cheung, representing Wong, said the conviction would cost his client custody of his eight-year-old daughter. But Judge Britton said he saw no grounds to offer a reduced sentence to either man.