Bomb alert at Belfast's Victoria Square Shopping Centre
The Victoria Square shopping complex in Belfast city centre has now reopened.
The building was evacuated on Tuesday morning after reports of a suspicious device, but police said nothing was found.
Earlier, in Dublin, just hours before the Queen's visit, there was a bomb scare at the Luas tramline. It turned out to be a hoax.
On Monday evening, a bomb was found on a bus at Maynooth, in the Republic of Ireland. No-one was injured.