A roundup of explosions and bomb plots in Europe

Major Europe attack plots

A roundup of explosions and bomb plots in the continent from Madrid in 2004 to Friday's Oslo bombing.

July 22 bomb blast in the Norwegian capital, Oslo [AFP] Oslo bombing A massive bomb shattered Norway's main government building in Oslo on July 22, 2011, killing two people, police were quoted as saying by local news agency NTB. There was no claim of responsibility, though Norway, as a NATO member, has been the target of threats, if not bombs, before, notably over its involvement in conflicts in Afghanistan and Libya. Madrid bombings On March 11, 2004, 10 bombs hidden in sports bags exploded on four packed commuter trains at the height of the morning rush hour in Madrid, killing 191 people and wounding 1,700. Three weeks after the blasts, seven men including two  suspected bombing ringleaders blew themselves up in an apartment after police closed in on them. The blast killed a policeman. London bombngs Four suicide bomb blasts on London transport during the  morning rush hour on July 7, 2005, killed 52 people and injured  about 700 in the first suicide bombing attacks in  western Europe. On July 21, four men made a failed attempt to  carry out a second wave of attacks on three London underground  stations and a bus. Barcelona plot Spain's high court on December 14, 2009, jailed 11 men for up  to 14 and a half years for attempted suicide bombings on  Barcelona's metro in 2008. Airline bombing plot Three Britons were found guilty in September 2009 of  plotting to kill thousands by blowing up transatlantic airliners bound for North America in mid-flight suicide attacks using  bombs made from liquid explosives. Shoe bomber plot Richard Reid, a British-born follower of Osama bin Laden, was sentenced to life in prison in January 2003 for trying to  blow up a transatlantic flight with explosives stuffed in his  shoes. Reid tried to blow up American Airlines Flight 63 on December 22, 2001, as it flew to Miami from Paris. He was unapologetic for his actions and said he was "at war" with the US  because it sponsored "rape and torture". Courtesy: Al Jazeera