Cllr Cusack said: “This has been an ongoing concern which seems to come and go, and while constant work has been done by the Community Safety Wardens, PSNI and the owners to try deal with the issue, the problem is continuing.
“I have been informed that up to an over forty youths have been found occupying the premises to drink and party at the weekends, the most recent being Friday night.
“Apparently the landlords have taken measures to secure the premises, however access is still possible due to the size of the site.
“I fear this could have serious safety implications for those involved not to mention a potential fire hazard as is so often the case with vacant buildings.
“The public need to be extra vigilant as we don’t want a repeat the former Foyle College Fire we had to deal with in the area last year.
“I would ask that parents speak to their children and the public report any suspicious activity they may see.
“The Wardens and Authorities who have frequently attempted to move them, have limited capacity and resources to patrol these areas and have to prioritise incidents so all public and parental input is appreciated.’’