Enhanced security measures have been implemented across Russia following the March 22 terrorist attack on the Crocus City Hall concert venue in Moscow, the deadliest attack in the country since the Beslan school siege in 2004.
Russia Tightens Security In Wake Of Moscow Concert Shooting
People visiting Red Square queue at metal detectors before entering on March 27.
The authorities say 143 people were killed in the attack at the Crocus City Hall concert venue and have warned that the death toll may still climb.
Police vans and security cordons near the Moscow Canal.
Russia has detained at least 11 people in connection with the attack and charged eight of them.
The attack has been claimed by Islamic State, a designated terrorist group.
Police officers stand behind barriers at Red Square.
A security check prior to a concert by the rock group Piknik in St. Petersburg. The band said proceeds from the event would go to victims and their families. The band had been due to perform at Crocus City Hall on the night of the massacre.
A man wearing a shirt with an image of Russian President Vladimir Putin looks through a window as police guard the area around the Oktyabrsky Concert Hall in St. Petersburg.
Military cadets walk in front of the concert hall.
The heightened security measures will likely continue in crowded areas, on transportation, and at airports nationwide during the coming weeks.