The web site of pro-life group Youth Defence has apparently been hacked, to show an image supporting same sex marriage.
It's a picture of the new mural on the corner of Dame Street and George's Street, which shows two men embracing.
The banner title has been changed to say Vote Yes, and the rest of the web site can't be accessed.
The original mural is by illustrator and street artist Joe Caslin.
Find out more about it here.
