• A woman walks to lay flowers at a makeshift memorial near the Crocus City Hall following last Friday's deadly attack on the concert venue in Moscow. Reuters
    A woman walks to lay flowers at a makeshift memorial near the Crocus City Hall following last Friday's deadly attack on the concert venue in Moscow. Reuters
    A woman walks to lay flowers at a makeshift memorial near the Crocus City Hall following last Friday's deadly attack on the concert venue in Moscow. Reuters
    A woman walks to lay flowers at a makeshift memorial near the Crocus City Hall following last Friday's deadly attack on the concert venue in Moscow. Reuters
  • At least 139 people were killed and more than 180 hospitalised after a group of gunmen attacked the concert hall in Moscow. Reuters
    At least 139 people were killed and more than 180 hospitalised after a group of gunmen attacked the concert hall in Moscow. Reuters
    At least 139 people were killed and more than 180 hospitalised after a group of gunmen attacked the concert hall in Moscow. Reuters
    At least 139 people were killed and more than 180 hospitalised after a group of gunmen attacked the concert hall in Moscow. Reuters
  • The Russian rock band Picnic was due to perform at the Crocus City Hall before the attack. EPA
    The Russian rock band Picnic was due to perform at the Crocus City Hall before the attack. EPA
    The Russian rock band Picnic was due to perform at the Crocus City Hall before the attack. EPA
    The Russian rock band Picnic was due to perform at the Crocus City Hall before the attack. EPA
  • On Tuesday, police officers were on high alert as they guarded the Oktyabrsky Concert Hall, ahead of the 'Picnic' rock concert in St. Petersburg. EPA
    On Tuesday, police officers were on high alert as they guarded the Oktyabrsky Concert Hall, ahead of the 'Picnic' rock concert in St. Petersburg. EPA
    On Tuesday, police officers were on high alert as they guarded the Oktyabrsky Concert Hall, ahead of the 'Picnic' rock concert in St. Petersburg. EPA
    On Tuesday, police officers were on high alert as they guarded the Oktyabrsky Concert Hall, ahead of the 'Picnic' rock concert in St. Petersburg. EPA
  • Police officers checked people heading to the concert hall. EPA
    Police officers checked people heading to the concert hall. EPA
    Police officers checked people heading to the concert hall. EPA
    Police officers checked people heading to the concert hall. EPA
  • Military cadets walk in front of the Oktyabrsky Concert Hall on March 27. EPA
    Military cadets walk in front of the Oktyabrsky Concert Hall on March 27. EPA
    Military cadets walk in front of the Oktyabrsky Concert Hall on March 27. EPA
    Military cadets walk in front of the Oktyabrsky Concert Hall on March 27. EPA
  • Police officers keep watch outside the Oktyabrsky Concert Hall, amid heightened security measures in the wake of a terrorist attack at the Crocus City Hall concert venue, prior to the concert of the rock group 'Picnic' in St. Petersburg, Russia. EPA
    Police officers keep watch outside the Oktyabrsky Concert Hall, amid heightened security measures in the wake of a terrorist attack at the Crocus City Hall concert venue, prior to the concert of the rock group 'Picnic' in St. Petersburg, Russia. EPA
    Police officers keep watch outside the Oktyabrsky Concert Hall, amid heightened security measures in the wake of a terrorist attack at the Crocus City Hall concert venue, prior to the concert of the rock group 'Picnic' in St. Petersburg, Russia. EPA
    Police officers keep watch outside the Oktyabrsky Concert Hall, amid heightened security measures in the wake of a terrorist attack at the Crocus City Hall concert venue, prior to the concert of the r
  • Riot police check the bags of spectators as they guard an area at the Oktyabrsky Concert Hall prior to the concert of the rock group 'Picnic' and the symphony orchestra 'Tavrichesky' in St. Petersburg, Russia, Wednesday, on March 27. AP
    Riot police check the bags of spectators as they guard an area at the Oktyabrsky Concert Hall prior to the concert of the rock group 'Picnic' and the symphony orchestra 'Tavrichesky' in St. Petersburg, Russia, Wednesday, on March 27. AP
    Riot police check the bags of spectators as they guard an area at the Oktyabrsky Concert Hall prior to the concert of the rock group 'Picnic' and the symphony orchestra 'Tavrichesky' in St. Petersburg, Russia, Wednesday, on March 27. AP
    Riot police check the bags of spectators as they guard an area at the Oktyabrsky Concert Hall prior to the concert of the rock group 'Picnic' and the symphony orchestra 'Tavrichesky' in St. Petersburg
  • Cadets of the Fire and Rescue College stand in front of at a makeshift memorial near the Crocus City Hall following a deadly attack on the concert venue in the Moscow Region, Russia, on March 27. Reuters
    Cadets of the Fire and Rescue College stand in front of at a makeshift memorial near the Crocus City Hall following a deadly attack on the concert venue in the Moscow Region, Russia, on March 27. Reuters
    Cadets of the Fire and Rescue College stand in front of at a makeshift memorial near the Crocus City Hall following a deadly attack on the concert venue in the Moscow Region, Russia, on March 27. Reuters
    Cadets of the Fire and Rescue College stand in front of at a makeshift memorial near the Crocus City Hall following a deadly attack on the concert venue in the Moscow Region, Russia, on March 27. Reut