A 10-year-old boy committed suicide by hanging himself in his bedroom on Saturday, marking the third student suicide in Hong Kong in a week.

The tragedy was discovered in an apartment in Bayview Garden in Tsuen Wan, the New Territories when the boy’s 36-year-old mother knocked on her son’s door to call him to dinner at around 7pm on Saturday, Oriental Daily reported.

When the boy did not respond, his mother tried to open the door but found it to be locked. She immediately called in a locksmith to open the door.

They found that the boy had hung himself with a rope.

The mother called the police and paramedics rushed the boy, who was in an unconscious state, to Yan Chai Hospital. He was later pronounced dead.

It was understood that the boy was primary five student who had a good academic record at an elite school in Kowloon Tong.

In recent days, he had been in an emotional state, easily upset and had threatened to commit suicide or hurt other family members, Apple Daily reported, adding that medical consultation had suggested that the boy might suffer from Asperger’s syndrome.

The boy went to school for extra-curricular activities on Saturday morning and returned home at 5pm. He stayed in his room until his mother knocked on his bedroom door at dinner time.

No suicide note was found, and an initial police investigation concluded that no foul play was involved.

This is the third case of student-age suicide in Hong Kong in a week.

Read: Hong Kong secondary school student, 13, jumps to her death