Tyres were ripped and wheelrims destroyed after rocks were thrown on the highway in the early hours of 2 April

Dozens of rocks thrown from a bridge onto northbound Tolo Highway ripped tyres to shreds and damaged wheels in the early hours of this morning, with Tai Po police hunting for suspects in the third such case in recent months.

Four cars, a taxi and a light goods vehicles had their tyres ripped by the sharp-edged rocks. Police estimate as many as 30 were thrown onto the highway, near Kwong Fuk Estate in Tai Po, with motive unknown.

Nobody was injured, and police are treating the case as criminal damage. “The police reprimand such irresponsible behaviour that ignores the safety of road users,” said a spokesman. “These actions may cause serious traffic accidents and casualties.”

Criminal Damage is liable to a maximum sentence of life imprisonment upon conviction.

A similar case was reported at the end of February, when a rock thrown from a bridge onto southbound Fanling Highway put a taxi passenger in hospital. Other cases have occurred along Tolo Highway and Fanling Highway in the last few months, according to police.

Damage to a wheel rim after a car struck one of 30 rocks that rained down on Tolo Highway before dawn this morning