At least 60 people have been killed after gunmen attacked a packed concert venue on the outskirts of Moscow, Russian intelligence said.
More than 100 were wounded at the Crocus City Hall, the FSB Federal Security Service added.
The Islamic State group has claimed it carried out the attack. Russia has not commented.
Dramatic video shows panicked concertgoers taking cover as shots and explosions ring out
A large fire engulfed the roof of the complex and Russia’s national guard is searching for the gunmen
The White House said it is working to find out more about the situation and Ukraine has denied any involvement in the attack, BBC reports.