A suspected member of an Irish Republican Army splinter group has been charged with trying to kill an off-duty prison officer by placing a booby-trap bomb under his vehicle.

The prison officer was seriously wounded March 4 when the bomb exploded beneath his van as he drove away from his Belfast home to go to work.

Christopher Robinson offered no plea at his arraignment Saturday on charges of attempted murder and possession of a homemade bomb. A judge denied bail to the 45-year-old from the Belfast suburb of Dunmurry. Detectives continued to question a second suspect.

A faction labeled the "New IRA" claimed responsibility for the attack. While most IRA members renounced violence and disarmed in 2005, splinter groups still seek to force Northern Ireland out of the United Kingdom.