Two men were arrested yesterday evening near Dundalk after gardaí uncovered what is believed to be a major dissident bombing operation. Armed gardaí led by detectives raided a premises north of the town at about 7pm. The two men, in their 30s and 50s, were found working on a trailer. Gardaí discovered gas cylinders inside the trailerwhich had been modified. They believe they were being prepared for a bombing operation across the border.