The cause of Nora Quoirin's death remains unknown as the investigation continues into what happened to the 15-year-old whose body was discovered more than a week after she went missing in Malaysia.

An update on the cause of death had been expected on Wednesday but a post-mortem examination at a hospital in Seremban is ongoing and no further developments are expected until Thursday.

The teenager - who was born with the brain defect holoprosencephaly and was described by her family as "vulnerable" - disappeared on Sunday August 4.

Her body was discovered on Tuesday beside a small stream about 1.6 miles from the jungle resort of Dusun, where she had been on holiday with her parents and two siblings.

Mike Reeves, headteacher of Garratt Park School where Nora attended paid tribute to her.

"The Garratt Park School community is deeply shocked and saddened by this awful news," he said.

"Nora was a delight to work with, and focused very hard on making the best of her abilities.

"We are a small school, so most of our students knew Nora.

"We will be working hard to support our other students and their parents and carers. Our thoughts and prayers are with Nora's family."

Nora was also a student and parishioner at St Bede's Church in Clapham Park.

A statement was posted on the Archdiocese of Southwark's website.

"It is with great sadness that we received the news today of the discovery of the body of Nora Quoirin, who disappeared whilst on holiday with her family in Malaysia," it read.

"Little can take away the desolation that is experienced at the loss of a loved one.

"However, at this most painful of times the Catholic community wishes to extend its prayerful support to Nora’s family in heartfelt love and compassion: we walk alongside them as they grieve her loss.

"Mindful of their sadness, we also pray for the comfort of those who have been involved in the search for Nora, the parishioners of St Bede’s RC Church, Clapham Park, where the family attend Mass, as well as school friends and staff.

"God is in all things and his grace is with us in all circumstances. We commend Nora to God’s tender care, asking him also to pour out peace, consolation and healing on those that mourn her this day.

"We respectfully ask that the family and friends of Nora are granted privacy at this time. Thank you."