THE bodies of two schoolgirls killed in the Pat Sin Leng tragedy can be claimed by their families for burial this weekend. The results of DNA fingerprinting tests expected today will distinguish between the remains of classmates Lung Yue-ying and Kwong Shu-ling, both 13. Consultant forensic pathologist Dr Mong Hui-keung, who this week conducted post mortem examinations on the victims, said there were no reasons to delay the return of their bodies to their families. 'The whole purpose of trying to confirm the identities is to facilitate the families in reclaiming the bodies,' Dr Mong said. The South China Morning Post yesterday revealed Government Laboratory scientists were using a sophisticated DNA profiling technique for the first time to produce a quicker result. Assistant government chemist Dr Ned Dailly said the polymerase chain reaction test was being used for 'humanitarian reasons'. A memorial service for the pupils and teachers Wong Sau-mei and Chow Chi-chai will be held at Fung Yiu King Memorial Secondary School in Ma On Shan from 12 noon to 7 pm today. The service is open to the public.