Hong Kong - Five people died and two injured in a day of suicide jumps from high-rise buildings in Hong Kong.

Police said Sunday four of those who jumped were suspected suicides while three were still being investigated.

All the incidents took place between 2 am and 7:30 pm Saturday and were unrelated.

Of those believed to have jumped to their deaths two men, aged 48 and 49, were known to have mental problems.

The youngest to have died was a 16-year-old girl who was certified dead after jumping from the 22nd floor of a building, while the oldest was a 86-year-old man, who is also believed to have jumped.

Three cases are still under investigation: an 81-year-old woman who died, and a 17-year-old man and a 37-year-old woman both of whom were taken to hospital after being found unconscious after falling from high buildings.

Jumping from high-rise buildings is the most common form of suicide in the former British colony, followed by inhalation of poison fumes from burning charcoal.

Around 1,000 people committed suicide in Hong Kong in 2007 - about three a day - down from around 1,200 in 2003 in the dark days of SARS (Severe Acute Respiratory Syndrome). (dpa)