Derry car bomb: Dissident republicans have targeted city multiple times
This is not the first time dissident republicans have targeted the Bishop Street Courthouse in Londonderry in recent times.
In March 2011, a 110lb bomb was abandoned in a beer keg inside a stolen car on Bishop Street. Oglaigh na hEireann later claimed it planted the device. On that occasion, the security forces had enough time to carry out controlled explosions.
Derry has been a primary focus for dissident republicans since the IRA ceasefire, and disruption has followed countless hoaxes.
In August 2010, Oglaigh na hEireann claimed responsibility for a car bomb (above) outside Strand Road police station. While no one was injured, a number of businesses were damaged.
In October 2010, the Real IRA detonated a car bomb on the Culmore Road, near an Ulster Bank and Da Vinci's Hotel.
In January 2012, bombs exploded at a tourist centre on Foyle Street and council offices on Strand Road within 10 minutes of each other.
In March 2013, a major attack on Strand Road police station was thwarted following the discovery of four mortar rockets which were ready to be fired.
In April 2015, a car bomb exploded outside probation service offices in Crawford Square. No-one was injured.