Twelve men arrested in a joint Garda/RUC operation on either side of the Border in the Cullaville area on Monday, were still in custody last night. Six men were held at Monaghan and Carrickmacross Garda stations. It is understood they were being questioned about the Vauxhall Cavalier car used in the Omagh bombing, which was stolen in Carrickmacross, Co Monaghan on August 13th. Another six men were being questioned by the RUC.