Extra officers patrolling the route
Pedestrians have had to 'jump out the way' of motorcyclists illegally using the Heritage Trail, according to police.
It's been happening along the old railway line between Union Mills and Crosby.
Officers say it's not an access road and is clearly signposted to say motor vehicles aren't allowed.
Inspector Paul Kemp says it's extremely dangerous:
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Road closures in place following incident in Hillberry area
Police response ongoing with Little Mill Road, Cronk-ny-Mona and Creg Ny Baa affected