Update - 5.43pm: Fianna Fail TD for Dublin Bay North, Sean Haughey has said that stricter controls are needed to improve the safety of deadly quad bikes and scramblers.

The Deputy was commenting following an incident involving a scrambler on Saturday afternoon in Darndale Park, North Dublin which left one man in a serious condition at Beaumont Hospital.

There are currently no legal rules in place requiring quad bike manufacturers to have roll cages on the vehicle. There are also no health and safety rules requiring the mandatory use of protective headgear.

The local TD said, “For quite some time, quad bikes and scramblers have been causing chaos in communities across Dublin. These vehicles are incredibly dangerous and have the potential to cause serious accident and injury.

“Sadly, it takes incidents such as the one which happened in our area at the weekend, for us to stop in our tracks and recognise the need for a stronger legislative framework to protect those that insist on using them, particularly young people that are unsupervised by an adult.

“Perhaps setting a minimum age limit on the use of quads and scramblers would help alleviate the number of accidents and make it less likely for them to occur in our community.

“We need to see greater enforcement and compliance with the existing by-laws so people are more likely to heed the dangers of improper use,” he said.

Update 5.11pm A man is in a critical condition in hospital after a scrambler bike landed on his head in Darndale Park in Dublin.

The 39-year-old was injured while sunbathing at the park when the scrambler drove over the brow of a hill and collided with him.

He is currently being treated at Beaumont Hospital where his condition is being described as critical.

A 16-year-old boy is assisting gardaí with their inquiries.

Update - 12.59pm: Gardaí are appealing for information after a man was seriously injured by a scrambler motorbike in Darndale Park in Dublin.

At around 2pm on Saturday, a man and woman were sunbathing at the park when the scrambler drove over the brow of a hill and collided with the couple.

The 39-year-old man suffered serious head injuries and is currently in Beaumont hospital where his condition is described as critical.

A 16-year-old teenage boy is helping officers with their investigation.

Gardaí are appealing to anyone who may have witnessed the incident or who may have information to contact Coolock Garda Station on 01-666 4200, the Garda Confidential Line 1800 -666 111 or any Garda Station.

7.25am: Man fighting for his life after scrambler lands on his head in Dublin park

A man has been seriously injured after a scrambler landed on his head while sunbathing in a Dublin park.

The Herald reports he was lying out in Darndale at around 2pm on Saturday afternoon when the motorbike went out of control.

Witnesses have told Gardaí it was being ridden by a man over the crest of a hill when it became airborne.

He was rushed to hospital with serious head injuries.