Officials say a Northern Ireland man has suffered serious wounds when a booby-trapped bomb exploded as he removed a sign bearing threats from an Irish Republican Army faction.

The Irish nationalist Sinn Fein party says the man may lose an eye after Wednesday's blast near Crossmaglen, a Northern Ireland border town long known as a power base for the outlawed IRA.

Sinn Fein lawmaker Conor Murphy says the man was trying to take down a poster on a pole outside his home when an attached device exploded in his face. He says an IRA splinter group opposed to Northern Ireland's peace process recently threatened the man's family. The sign accused residents of informing police about that IRA faction's criminal activities.

Most IRA members renounced violence and disarmed in 2005.