Further measures have been taken to prevent access to Dromore viaduct following reports of youngsters hurling bricks from the top of the 74ft high Victorian landmark.
The move came as some local parents voiced concerns that not enough was being done to stop teenagers walking along the top of the disused railway conduit, with the access gate on occasions reportedly lying open.
However, a council spokesperson said: “Public access to the viaduct has now been further secured with heavy duty padlocks and chains.
“Since the placing of these security measures no further reports of illegal access have been reported.
“The council will continue to monitor the situation.”
One local parent nonetheless urged the council to keep regular checks on the viaduct gates to ensure padlocks were not removed at a future point.
“I know that on at least one occasion my child has been on the viaduct when the gate was left open,” saidthe parent, who did not want to be named.
“I don’t know if the padlock was removed with bolt-cutters or what, but the council need to keep a constant check.
“Since this, my son knows he is not allowed to go there, but teenagers are explorers and if the gate is left lying open others will be tempted and this is a real danger.”
Police issued a warning following last week’s brick-hurling incident.
Inspector Leslie Badger said: “This type of activity is reckless and could easily end up with someone being seriously hurt.
“It may seem like a bit of harmless fun but it only takes one stone to cause serious injury or worse.
“I would ask any young person who is involved in this to take a moment to consider the possible consequences.
“If you hurt or damage another person or property you could end up with a criminal record.
“This will have consequences on your career, education and travel opportunities.
“I would ask parents to speak to their children and know where they are and what they are doing. If you witness this activity please contact us immediately on 101.”