KUALA LUMPUR, Oct. 4 -- The family of 16-year-old Yap Shing Xuen, who was fatally stabbed at a Bandar Utama secondary school last year, has claimed in a lawsuit that breaches of duty of care by the assailant's parents, school authorities and government agencies contributed to her death.

In the lawsuit filed in the High Court on October 1, Wong Lee Ping and Yap's sister, Shing Tong, were named as the plaintiffs, with 18 respondents named in the suit.

Among those named are the boy's parents, the boy himself, and several school authorities, including his homeroom teacher, the school principal, and teachers responsible for counselling and student affairs.

The family also named officers from the Petaling Utama district education office, the...