DUBLIN: Northern Ireland police say a 25-year-old officer has been killed by a booby-trap bomb placed under his car. Neighbors of the victim say the car was put ablaze by the blast in a neighborhood of Omagh. They say the victim had only recently joined the police force. Since 2007, Irish Republican Army dissidents have planted dozens of booby-trap bombs under the private cars of police officers. The bombs usually fail to detonate and had killed nobody until Saturday. Previously, two policemen have lost their legs in attacks in May 2008 and January 2010.