Now playing Next United Kingdom Car attacker mows down crowds and stabs policeman outside UK parliament A car has mowed down pedestrians near the Houses of Parliament, injuring many. Inside the grounds a man stabbed a policeman before being shot. 22/03/2017
Now playing Next USA White House in lockdown after car bomb scare The White House was once again in lockdown on Saturday after a car reportedly containing a bomb drove up to a security check point. 19/03/2017
Now playing Next USA Texas hospital "shooting" false alarm Police in the US state of Texas have found no evidence of a shooting incident at a hospital in Houston, Texas. 21/02/2017
Now playing Next Germany Threatening emails send German schools into lockdown Emails threatening violence sent numerous German high schools into lockdown on Monday. 17/10/2016
Now playing Next USA US: at least 4 shot dead at shopping mall in Burlington, suspect at large At least four people have been shot dead at Cascade Mall, around 100km north of Seattle, Washington State Patrol reports. 24/09/2016
Now playing Next Germany Munich: what happened and when How Germany's third-largest city went into lockdown when the shooting rampage began at around 6pm on Friday evening. 23/07/2016
Now playing Next Germany Amateur video shows Munich gunman at mall Police are looking for a motive for Friday's attack. A spokesman for Chancellor Angela Merkel would neither confirm nor deny a link to terrorism. 23/07/2016
Now playing Next Germany Munich shooting: teenage German-Iranian believed to have acted alone An 18-year-old German-Iranian is suspected to be behind a shooting rampage in Munich, opening fire in a busy shopping mall and killing at least nine people. 23/07/2016
Now playing Next USA Dallas police shootings: eyewitnesses describe horror Downtown Dallas remained under heavy police lockdown following the multiple shootings which left at least five law enforcement officers dead. 08/07/2016
Now playing Next Israel Israel approves new West Bank settlements amid surge in Palestinian violence Israel pushes ahead with more West Bank settlements after a wave of attacks by Palestinians in the occupied territory 03/07/2016
Now playing Next USA Situation contained at UCLA, 2 dead police confirm, investigating possible murder-suicide The situation at the University of California in Los Angeles is now contained after reports of a shooting. 01/06/2016
Now playing Next Turkey Clashes erupt at rally to mark third anniversary of Gezi park protests Police clashed with activists who gathered at Istanbul's famous Istiklal street, with the aim of marching to the park. However, as every year the site was on lockdown along with Taksim Square. 31/05/2016
Now playing Next USA UPDATE: White House partial lockdown lifted on Memorial Day The White House has resumed ‘normal operations’ after it was placed on a partial lockdown after a person threw an object over the fence. 30/05/2016
Now playing Next USA Lockdown at White House after armed man shot at checkpoint The White House was briefly put on lockdown on Friday after a shooting in the surrounding streets while President Obama was away playing… 20/05/2016
Now playing Next Belgium The week that changed Brussels forever Follow the horror as it unfolded - told in the words of those involved 29/03/2016
Now playing Next USA Shooting reported at US Capitol Reports of gunshots at the US Capitol complex have triggered a major security operation in Washington DC. The shooting is believed to have happened 28/03/2016
Now playing Next Belgium Brussels travellers struggle with security checks After Tuesday's terror attacks, travellers in Brussels have been subject to a major security operation with troops and police checking bags leading to long delays at stations. 23/03/2016