Irish Rail has said the Dublin to Belfast rail service re-opened at about 3pm, after being out of action since yesterday morning after two suspicious devices had been found on the line.
The service this morning only operated as far as Dundalk on the south side and Newry on the north side.
One package was dealt with yesterday but the second one could only be cleared this morning.
The alert led to the cancellation of special trains that had been due to carry hundreds of fans to the Ulster final replay in Croke Park yesterday afternoon.
In Co Antrim, resident were allowed to return to their homes early this morning after a suspicious package in Castlereagh was also declared a hoax.
