UTV reporter Marc Mallett has been told by a a consultant from Belfast's Royal Victoria Hospital that the symptoms of those taken to hospital following a major incident at a concert are consistent with 'drugs and alcohol misuse'.
Consultant at RVH says symptoms of those treated tonight are consistent with drugs & alcohol misuse. Major incident not yet stood down
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The world's first ever 'hole in the wall' was installed in Enfield, north London, on June 27 1967.
America says it has "identified preparations" for an attack similar to that which killed at least 86, including 30 children, in April.