He said the suspect had come into contact with gardai on January 1 when inquiries about his immigration status were conducted.
The senior officer said he believed the teenager was seeking asylum in the Irish Republic.
Investigators were yesterday working to establish whether or not the knifeman knew his victims and whether the incident was planned.
Gardai have not established a definite motive for the violent spree, but Chief Superintendent Christy Mangan said yesterday a potential terror link was being investigated.'A terror attack is a line of inquiry,' he said yesterday.'It is certainly a line that we would look at.
Both men were on their way to work when a knifeman struck, stabbing them both in the back.
Police said at the time of the arrest that terrorism was one line of enquiry they were pursuing.'At this time, we can find no established link to indicate that this tragedy is terrorist-related,' they said in a statement on Thursday.
'However, enquires are continuing internationally as the investigation develops.' The rampage was described as a series of 'random attacks' yesterday when Gardai arrested a heavily-armed teenager born in North Africa.
The knife attack happened shortly before 9am in Dundalk and the victim was pronounced dead at the scene.It is a consensus classification in which a number of experts have agreed on the classification and diagnostic criteria.In general, the classification stratifies neoplasms according to their lineage (myeloid, lymphoid, histiocytic/dendritic) and distinguishes neoplasms of precursor cells from those comprised of functionally mature cells.Her writings and interviews have been featured on CBC’s Fresh Air and Life Rattle Press.When she’s not writing she attends Al Hikmah Islamic Centre for their full time program on the study of the Qur’an.is on the IBBY List of Books for Children Living With Disabilities.