A Hong Kong man and his mainland accomplice are to be executed after losing their appeal against conviction for a mass murder at an alleged triad member's home in Panyu. Guangdong Provincial Higher People's Court yesterday upheld the death sentences handed down on So Kwai-biu and mainlander Chen Weicheng, both 38, over the killing of seven people at Clifford Estate, Panyu, on June 7. The victims, including alleged triad member and Hong Kong man Ng Chun-fai, were killed by the pair over a dispute concerning an 'ice' manufacturing and trafficking operation in 1997. Ng, who was a childhood friend of So, was said to have close links to Macau's casino underworld. The other victims were Ng's mother, his sister, who was a Hong Kong resident, his girlfriend, an Australian passport holder, his girlfriend's mother and two friends including an American-Chinese. So and Chen, both 38, were sentenced to death on November 3 for committing the murders at Ng's home. The pair appealed against the sentences, with So claiming it was Chen who committed the murders as he was not at the scene when the killings took place. Chen argued in his appeal that he did not kill anyone as he was just pointing a gun at the five women victims while So shot them. But the Guangdong court yesterday said there was sufficient evidence to prove the pair committed the crimes and that Chen's help also amounted to murder. The pair were also found guilty of robbing and murdering Hong Kong businessman Chow Tung-chun in Hunan in January. So also was convicted of several robberies, possession of firearms and drugs and storage of explosives and fined 6,000 yuan (HK$5,580), while Chen also was found guilty of robberies and wounding and fined 5,000 yuan. The pair are expected to be executed immediately after Beijing's Supreme People's Court has endorsed the ruling.